diff --git a/jest.config.js b/jest.config.js
index b923e4a..7f889de 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -9,5 +9,15 @@ module.exports = {
         ['lcov', { projectRoot: '../' }],
         'text-summary',
     ],
-    transformIgnorePatterns: ["/node_modules/(?!key-did-resolver/)"]
+    transformIgnorePatterns: ["/node_modules/(?!key-did-resolver/)"],
+    transform: {
+        // '^.+\\.[tj]sx?$' to process ts,js,tsx,jsx with `ts-jest`
+        // '^.+\\.m?[tj]sx?$' to process ts,js,tsx,jsx,mts,mjs,mtsx,mjsx with `ts-jest`
+        '^.+\\.tsx?$': [
+            'ts-jest',
+            {
+                tsconfig: 'configs/tsconfig.esm.json',
+            },
+        ],
+    },
 };
diff --git a/package-lock.json b/package-lock.json
index 3fd51d0..52b9780 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,11 +1,11 @@
 {
-  "name": "@inprd/ssi",
+  "name": "@jpmorganchase/onyx-ssi-sdk",
   "version": "0.0.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
-      "name": "@inprd/ssi",
+      "name": "@jpmorganchase/onyx-ssi-sdk",
       "version": "0.0.1",
       "license": "Apache-2.0",
       "dependencies": {
@@ -13,7 +13,6 @@
         "@ethersproject/providers": "^5.6.8",
         "@nomicfoundation/hardhat-chai-matchers": "^1.0.3",
         "@nomicfoundation/hardhat-network-helpers": "^1.0.4",
-        "@nomicfoundation/hardhat-toolbox": "^2.0.2",
         "@nomiclabs/hardhat-ethers": "^2.1.1",
         "@nomiclabs/hardhat-etherscan": "^3.1.0",
         "@nomiclabs/hardhat-solhint": "^2.0.1",
@@ -22,6 +21,8 @@
         "@typechain/hardhat": "^6.1.2",
         "@types/chai": "^4.3.5",
         "@types/lodash": "^4.14.194",
+        "ajv": "^8.12.0",
+        "ajv-formats": "^3.0.1",
         "axios": "^1.3.5",
         "chai": "^4.3.7",
         "did-jwt": "6.11.6",
@@ -31,9 +32,8 @@
         "ethr-did-resolver": "^8.0.0",
         "hardhat": "^2.14.0",
         "hardhat-gas-reporter": "^1.0.9",
-        "jsonschema": "^1.4.1",
-        "jsonwebtoken": "^9.0.0",
-        "key-did-resolver": "1.4.0",
+        "jose": "^5.2.4",
+        "key-did-resolver": "^1.4.0",
         "lodash": "^4.17.21",
         "loglevel": "^1.8.1",
         "solidity-coverage": "^0.8.2",
@@ -41,6 +41,7 @@
         "typechain": "^8.1.1"
       },
       "devDependencies": {
+        "@nomicfoundation/hardhat-toolbox": "^2.0.2",
         "@types/jest": "^29.5.1",
         "@types/jsonwebtoken": "^9.0.2",
         "@types/mocha": "^10.0.1",
@@ -651,6 +652,28 @@
         "url": "https://opencollective.com/eslint"
       }
     },
+    "node_modules/@eslint/eslintrc/node_modules/ajv": {
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+      "dev": true,
+      "dependencies": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
+    "node_modules/@eslint/eslintrc/node_modules/json-schema-traverse": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+      "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
+      "dev": true
+    },
     "node_modules/@eslint/js": {
       "version": "8.41.0",
       "resolved": "https://registry.npmjs.org/@eslint/js/-/js-8.41.0.tgz",
@@ -2505,6 +2528,7 @@
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/@nomicfoundation/hardhat-toolbox/-/hardhat-toolbox-2.0.2.tgz",
       "integrity": "sha512-vnN1AzxbvpSx9pfdRHbUzTRIXpMLPXnUlkW855VaDk6N1pwRaQ2gNzEmFAABk4lWf11E00PKwFd/q27HuwYrYg==",
+      "dev": true,
       "peerDependencies": {
         "@ethersproject/abi": "^5.4.7",
         "@ethersproject/providers": "^5.4.7",
@@ -3336,7 +3360,8 @@
     "node_modules/@types/mocha": {
       "version": "10.0.1",
       "resolved": "https://registry.npmjs.org/@types/mocha/-/mocha-10.0.1.tgz",
-      "integrity": "sha512-/fvYntiO1GeICvqbQ3doGDIP97vWmvFt83GKguJ6prmQM2iXZfFcq6YE8KteFyRtX2/h5Hf91BYvPodJKFYv5Q=="
+      "integrity": "sha512-/fvYntiO1GeICvqbQ3doGDIP97vWmvFt83GKguJ6prmQM2iXZfFcq6YE8KteFyRtX2/h5Hf91BYvPodJKFYv5Q==",
+      "dev": true
     },
     "node_modules/@types/node": {
       "version": "18.16.19",
@@ -3802,13 +3827,13 @@
       }
     },
     "node_modules/ajv": {
-      "version": "6.12.6",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
-      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+      "version": "8.12.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.12.0.tgz",
+      "integrity": "sha512-sRu1kpcO9yLtYxBKvqfTeh9KzZEwO3STyX1HT+4CaDzC6HpTGYhIhPIzj9XuKU7KYDwnaeh5hcOwjy1QuJzBPA==",
       "dependencies": {
         "fast-deep-equal": "^3.1.1",
-        "fast-json-stable-stringify": "^2.0.0",
-        "json-schema-traverse": "^0.4.1",
+        "json-schema-traverse": "^1.0.0",
+        "require-from-string": "^2.0.2",
         "uri-js": "^4.2.2"
       },
       "funding": {
@@ -3816,6 +3841,22 @@
         "url": "https://github.com/sponsors/epoberezkin"
       }
     },
+    "node_modules/ajv-formats": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/ajv-formats/-/ajv-formats-3.0.1.tgz",
+      "integrity": "sha512-8iUql50EUR+uUcdRQ3HDqa6EVyo3docL8g5WJ3FNcWmu62IbkGUue/pEyLBW8VGKKucTPgqeks4fIU1DA4yowQ==",
+      "dependencies": {
+        "ajv": "^8.0.0"
+      },
+      "peerDependencies": {
+        "ajv": "^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "ajv": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/amdefine": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/amdefine/-/amdefine-1.0.1.tgz",
@@ -4437,11 +4478,6 @@
         "ieee754": "^1.2.1"
       }
     },
-    "node_modules/buffer-equal-constant-time": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
-      "integrity": "sha512-zRpUiDwd/xk6ADqPMATG8vc9VPrkck7T07OIx0gnjmJAnHnTVXNQG3vfvWNuiZIkwu9KrKdA1iJKfsfTVxE6NA=="
-    },
     "node_modules/buffer-from": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.2.tgz",
@@ -5349,14 +5385,6 @@
         "safer-buffer": "^2.1.0"
       }
     },
-    "node_modules/ecdsa-sig-formatter": {
-      "version": "1.0.11",
-      "resolved": "https://registry.npmjs.org/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz",
-      "integrity": "sha512-nagl3RYrbNv6kQkeJIpt6NJZy8twLB/2vtz6yN9Z4vRKHN4/QZJIEbqohALSgwKdnksuY3k5Addp5lg8sVoVcQ==",
-      "dependencies": {
-        "safe-buffer": "^5.0.1"
-      }
-    },
     "node_modules/electron-to-chromium": {
       "version": "1.4.414",
       "resolved": "https://registry.npmjs.org/electron-to-chromium/-/electron-to-chromium-1.4.414.tgz",
@@ -5728,6 +5756,22 @@
         "url": "https://opencollective.com/eslint"
       }
     },
+    "node_modules/eslint/node_modules/ajv": {
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+      "dev": true,
+      "dependencies": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
     "node_modules/eslint/node_modules/ansi-styles": {
       "version": "4.3.0",
       "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
@@ -5823,6 +5867,12 @@
         "node": ">=8"
       }
     },
+    "node_modules/eslint/node_modules/json-schema-traverse": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+      "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg==",
+      "dev": true
+    },
     "node_modules/eslint/node_modules/supports-color": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
@@ -6915,9 +6965,12 @@
       }
     },
     "node_modules/function-bind": {
-      "version": "1.1.1",
-      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
-      "integrity": "sha512-yIovAzMX49sF8Yl58fSCWJ5svSLuaibPxXQJFLmBObTuCr0Mf1KiPopGM9NiFjiYBCbfaa2Fh6breQ6ANVTI0A=="
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.2.tgz",
+      "integrity": "sha512-7XHNxH7qX9xG5mIwxkhumTox/MIRNcOgDrxWsMt2pAr23WHp6MrRlN7FBSFpCpr+oVO0F744iUgR82nJMfG2SA==",
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
     },
     "node_modules/function.prototype.name": {
       "version": "1.1.5",
@@ -7244,6 +7297,26 @@
         "node": ">=6"
       }
     },
+    "node_modules/har-validator/node_modules/ajv": {
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+      "dependencies": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
+    "node_modules/har-validator/node_modules/json-schema-traverse": {
+      "version": "0.4.1",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+      "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg=="
+    },
     "node_modules/hardhat": {
       "version": "2.14.1",
       "resolved": "https://registry.npmjs.org/hardhat/-/hardhat-2.14.1.tgz",
@@ -7500,6 +7573,18 @@
         "minimalistic-assert": "^1.0.1"
       }
     },
+    "node_modules/hasown": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/hasown/-/hasown-2.0.2.tgz",
+      "integrity": "sha512-0hJU9SCPvmMzIBdZFqNPXWa6dqh7WdH0cII9y+CyS8rG3nL48Bclra9HmKhVVUHyPWNH5Y7xDwAB7bfgSjkUMQ==",
+      "devOptional": true,
+      "dependencies": {
+        "function-bind": "^1.1.2"
+      },
+      "engines": {
+        "node": ">= 0.4"
+      }
+    },
     "node_modules/he": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/he/-/he-1.2.0.tgz",
@@ -7886,12 +7971,12 @@
       }
     },
     "node_modules/is-core-module": {
-      "version": "2.12.1",
-      "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.12.1.tgz",
-      "integrity": "sha512-Q4ZuBAe2FUsKtyQJoQHlvP8OvBERxO3jEmy1I7hcRXcJBGGHFh/aJBswbXuS9sgrDH2QUO8ilkwNPHvHMd8clg==",
+      "version": "2.13.1",
+      "resolved": "https://registry.npmjs.org/is-core-module/-/is-core-module-2.13.1.tgz",
+      "integrity": "sha512-hHrIjvZsftOsvKSn2TRYl63zvxsgE0K+0mYMoH6gD4omR5IWB2KynivBQczo3+wF1cCkjzvptnI9Q0sPU66ilw==",
       "devOptional": true,
       "dependencies": {
-        "has": "^1.0.3"
+        "hasown": "^2.0.0"
       },
       "funding": {
         "url": "https://github.com/sponsors/ljharb"
@@ -9864,6 +9949,14 @@
         "url": "https://github.com/chalk/supports-color?sponsor=1"
       }
     },
+    "node_modules/jose": {
+      "version": "5.2.4",
+      "resolved": "https://registry.npmjs.org/jose/-/jose-5.2.4.tgz",
+      "integrity": "sha512-6ScbIk2WWCeXkmzF6bRPmEuaqy1m8SbsRFMa/FLrSCkGIhj8OLVG/IH+XHVmNMx/KUo8cVWEE6oKR4dJ+S0Rkg==",
+      "funding": {
+        "url": "https://github.com/sponsors/panva"
+      }
+    },
     "node_modules/js-sdsl": {
       "version": "4.4.0",
       "resolved": "https://registry.npmjs.org/js-sdsl/-/js-sdsl-4.4.0.tgz",
@@ -9928,9 +10021,9 @@
       "integrity": "sha512-es94M3nTIfsEPisRafak+HDLfHXnKBhV3vU5eqPcS3flIWqcxJWgXHXiey3YrpaNsanY5ei1VoYEbOzijuq9BA=="
     },
     "node_modules/json-schema-traverse": {
-      "version": "0.4.1",
-      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
-      "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg=="
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
+      "integrity": "sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug=="
     },
     "node_modules/json-stable-stringify-without-jsonify": {
       "version": "1.0.1",
@@ -9970,51 +10063,6 @@
         "node": "*"
       }
     },
-    "node_modules/jsonwebtoken": {
-      "version": "9.0.0",
-      "resolved": "https://registry.npmjs.org/jsonwebtoken/-/jsonwebtoken-9.0.0.tgz",
-      "integrity": "sha512-tuGfYXxkQGDPnLJ7SibiQgVgeDgfbPq2k2ICcbgqW8WxWLBAxKQM/ZCu/IT8SOSwmaYl4dpTFCW5xZv7YbbWUw==",
-      "dependencies": {
-        "jws": "^3.2.2",
-        "lodash": "^4.17.21",
-        "ms": "^2.1.1",
-        "semver": "^7.3.8"
-      },
-      "engines": {
-        "node": ">=12",
-        "npm": ">=6"
-      }
-    },
-    "node_modules/jsonwebtoken/node_modules/lru-cache": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-6.0.0.tgz",
-      "integrity": "sha512-Jo6dJ04CmSjuznwJSS3pUeWmd/H0ffTlkXXgwZi+eq1UCmqQwCh+eLsYOYCwY991i2Fah4h1BEMCx4qThGbsiA==",
-      "dependencies": {
-        "yallist": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
-    "node_modules/jsonwebtoken/node_modules/semver": {
-      "version": "7.5.1",
-      "resolved": "https://registry.npmjs.org/semver/-/semver-7.5.1.tgz",
-      "integrity": "sha512-Wvss5ivl8TMRZXXESstBA4uR5iXgEN/VC5/sOcuXdVLzcdkz4HWetIoRfG5gb5X+ij/G9rw9YoGn3QoQ8OCSpw==",
-      "dependencies": {
-        "lru-cache": "^6.0.0"
-      },
-      "bin": {
-        "semver": "bin/semver.js"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
-    "node_modules/jsonwebtoken/node_modules/yallist": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/yallist/-/yallist-4.0.0.tgz",
-      "integrity": "sha512-3wdGidZyq5PB084XLES5TpOSRA3wjXAlIWMhum2kRcv/41Sn2emQ0dycQW4uZXLejwKvg6EsvbdlVL+FYEct7A=="
-    },
     "node_modules/jsprim": {
       "version": "1.4.2",
       "resolved": "https://registry.npmjs.org/jsprim/-/jsprim-1.4.2.tgz",
@@ -10029,25 +10077,6 @@
         "node": ">=0.6.0"
       }
     },
-    "node_modules/jwa": {
-      "version": "1.4.1",
-      "resolved": "https://registry.npmjs.org/jwa/-/jwa-1.4.1.tgz",
-      "integrity": "sha512-qiLX/xhEEFKUAJ6FiBMbes3w9ATzyk5W7Hvzpa/SLYdxNtng+gcurvrI7TbACjIXlsJyr05/S1oUhZrc63evQA==",
-      "dependencies": {
-        "buffer-equal-constant-time": "1.0.1",
-        "ecdsa-sig-formatter": "1.0.11",
-        "safe-buffer": "^5.0.1"
-      }
-    },
-    "node_modules/jws": {
-      "version": "3.2.2",
-      "resolved": "https://registry.npmjs.org/jws/-/jws-3.2.2.tgz",
-      "integrity": "sha512-YHlZCB6lMTllWDtSPHz/ZXTsi8S00usEV6v1tjq8tOUZzw7DpSDWVXjXDre6ed1w/pd495ODpHZYSdkRTsa0HA==",
-      "dependencies": {
-        "jwa": "^1.4.1",
-        "safe-buffer": "^5.0.1"
-      }
-    },
     "node_modules/keccak": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/keccak/-/keccak-3.0.3.tgz",
@@ -12255,6 +12284,21 @@
         "node": ">=0.4.0"
       }
     },
+    "node_modules/solhint/node_modules/ajv": {
+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+      "dependencies": {
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
     "node_modules/solhint/node_modules/ansi-regex": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.1.tgz",
@@ -12471,6 +12515,11 @@
         "js-yaml": "bin/js-yaml.js"
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+          "version": "6.12.6",
+          "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
+          "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+          "requires": {
+            "fast-deep-equal": "^3.1.1",
+            "fast-json-stable-stringify": "^2.0.0",
+            "json-schema-traverse": "^0.4.1",
+            "uri-js": "^4.2.2"
+          }
+        },
         "ansi-regex": {
           "version": "3.0.1",
           "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.1.tgz",
@@ -24929,6 +24983,11 @@
             "esprima": "^4.0.0"
           }
         },
+        "json-schema-traverse": {
+          "version": "0.4.1",
+          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-0.4.1.tgz",
+          "integrity": "sha512-xbbCH5dCYU5T8LcEhhuh7HJ88HXuW3qsI3Y0zOZFKfZEHcpWiHU/Jxzk629Brsab/mMiHQti9wMP+845RPe3Vg=="
+        },
         "levn": {
           "version": "0.3.0",
           "resolved": "https://registry.npmjs.org/levn/-/levn-0.3.0.tgz",
@@ -25702,27 +25761,11 @@
         "strip-ansi": "^6.0.1"
       },
       "dependencies": {
-        "ajv": {
-          "version": "8.12.0",
-          "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.12.0.tgz",
-          "integrity": "sha512-sRu1kpcO9yLtYxBKvqfTeh9KzZEwO3STyX1HT+4CaDzC6HpTGYhIhPIzj9XuKU7KYDwnaeh5hcOwjy1QuJzBPA==",
-          "requires": {
-            "fast-deep-equal": "^3.1.1",
-            "json-schema-traverse": "^1.0.0",
-            "require-from-string": "^2.0.2",
-            "uri-js": "^4.2.2"
-          }
-        },
         "is-fullwidth-code-point": {
           "version": "3.0.0",
           "resolved": "https://registry.npmjs.org/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz",
           "integrity": "sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg=="
         },
-        "json-schema-traverse": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
-          "integrity": "sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug=="
-        },
         "string-width": {
           "version": "4.2.3",
           "resolved": "https://registry.npmjs.org/string-width/-/string-width-4.2.3.tgz",
@@ -26215,9 +26258,9 @@
           }
         },
         "ci-info": {
-          "version": "3.8.0",
-          "resolved": "https://registry.npmjs.org/ci-info/-/ci-info-3.8.0.tgz",
-          "integrity": "sha512-eXTggHWSooYhq49F2opQhuHWgzucfF2YgODK4e1566GQs5BIfP30B0oenwBJHfWxAs2fyPB1s7Mg949zLf61Yw==",
+          "version": "3.9.0",
+          "resolved": "https://registry.npmjs.org/ci-info/-/ci-info-3.9.0.tgz",
+          "integrity": "sha512-NIxF55hv4nSqQswkAeiOi1r83xy8JldOFDTWiug55KBu9Jnblncd2U6ViHmYgHf01TPZS77NJBhBMKdWj9HQMQ==",
           "optional": true,
           "peer": true
         },
@@ -26744,13 +26787,13 @@
           }
         },
         "resolve": {
-          "version": "1.22.2",
-          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.22.2.tgz",
-          "integrity": "sha512-Sb+mjNHOULsBv818T40qSPeRiuWLyaGMa5ewydRLFimneixmVy2zdivRl+AF6jaYPC8ERxGDmFSiqui6SfPd+g==",
+          "version": "1.22.8",
+          "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.22.8.tgz",
+          "integrity": "sha512-oKWePCxqpd6FlLvGV1VU0x7bkPmmCNolxzjMf4NczoDnQcIWrAF+cPtZn5i6n+RfD2d9i0tzpKnG6Yk168yIyw==",
           "optional": true,
           "peer": true,
           "requires": {
-            "is-core-module": "^2.11.0",
+            "is-core-module": "^2.13.0",
             "path-parse": "^1.0.7",
             "supports-preserve-symlinks-flag": "^1.0.0"
           }
@@ -26763,9 +26806,9 @@
           "peer": true
         },
         "semver": {
-          "version": "7.5.1",
-          "resolved": "https://registry.npmjs.org/semver/-/semver-7.5.1.tgz",
-          "integrity": "sha512-Wvss5ivl8TMRZXXESstBA4uR5iXgEN/VC5/sOcuXdVLzcdkz4HWetIoRfG5gb5X+ij/G9rw9YoGn3QoQ8OCSpw==",
+          "version": "7.6.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-7.6.0.tgz",
+          "integrity": "sha512-EnwXhrlwXMk9gKu5/flx5sv/an57AkRplG3hTK68W7FRDN+k+OWBj65M7719OkA82XLBxrcX0KSHj+X5COhOVg==",
           "optional": true,
           "peer": true,
           "requires": {
diff --git a/package.json b/package.json
index fe86b06..3e19be3 100644
--- a/package.json
+++ b/package.json
@@ -4,26 +4,17 @@
   "description": "SSI SDK for Onyx W3C Verifiable Credentials",
   "license": "Apache-2.0",
   "source": "src/index.ts",
-  "types": "./lib/cjs/types/index.d.ts",
   "main": "./lib/cjs/index.js",
+  "module": "./lib/esm/index.mjs",
+  "esnext": "./lib/esm/index.mjs",
+  "types": "./lib/esm/types/index.d.ts",
+  "type": "commonjs",
   "files": [
     "dist",
     "lib",
     "src",
     "LICENSE"
   ],
-  "exports": {
-    ".": {
-      "import": {
-        "types": "./lib/esm/types/index.d.ts",
-        "default": "./lib/esm/index.mjs"
-      },
-      "require": {
-        "types": "./lib/cjs/types/index.d.ts",
-        "default": "./lib/cjs/index.js"
-      }
-    }
-  },
   "repository": {
     "type": "git",
     "url": "https://github.com/jpmorganchase/onyx-ssi-sdk"
@@ -31,7 +22,7 @@
   "scripts": {
     "clean": "rm -rf ./lib",
     "build": "npm run clean && npm run build:esm && npm run build:cjs",
-    "build:esm": "tsc -p ./configs/tsconfig.esm.json && mv lib/esm/index.js lib/esm/index.mjs",
+    "build:esm": "tsc -p ./configs/tsconfig.esm.json",
     "build:cjs": "tsc -p ./configs/tsconfig.cjs.json",
     "prepack": "npm run build",
     "lint": "eslint .",
@@ -41,6 +32,7 @@
   "keywords": [],
   "author": "",
   "devDependencies": {
+    "@nomicfoundation/hardhat-toolbox": "^2.0.2",
     "@types/jest": "^29.5.1",
     "@types/jsonwebtoken": "^9.0.2",
     "@types/mocha": "^10.0.1",
@@ -57,7 +49,6 @@
     "@ethersproject/providers": "^5.6.8",
     "@nomicfoundation/hardhat-chai-matchers": "^1.0.3",
     "@nomicfoundation/hardhat-network-helpers": "^1.0.4",
-    "@nomicfoundation/hardhat-toolbox": "^2.0.2",
     "@nomiclabs/hardhat-ethers": "^2.1.1",
     "@nomiclabs/hardhat-etherscan": "^3.1.0",
     "@nomiclabs/hardhat-solhint": "^2.0.1",
@@ -66,6 +57,8 @@
     "@typechain/hardhat": "^6.1.2",
     "@types/chai": "^4.3.5",
     "@types/lodash": "^4.14.194",
+    "ajv": "^8.12.0",
+    "ajv-formats": "^3.0.1",
     "axios": "^1.3.5",
     "chai": "^4.3.7",
     "did-jwt": "6.11.6",
@@ -75,9 +68,8 @@
     "ethr-did-resolver": "^8.0.0",
     "hardhat": "^2.14.0",
     "hardhat-gas-reporter": "^1.0.9",
-    "jsonschema": "^1.4.1",
-    "jsonwebtoken": "^9.0.0",
-    "key-did-resolver": "1.4.0",
+    "jose": "^5.2.4",
+    "key-did-resolver": "^1.4.0",
     "lodash": "^4.17.21",
     "loglevel": "^1.8.1",
     "solidity-coverage": "^0.8.2",
@@ -87,5 +79,8 @@
   "overrides": {
     "flat": ">=5.0.1",
     "minimatch": ">=3.0.5"
+  },
+  "browser": {
+    "fs": false
   }
 }
diff --git a/src/services/common/did/did-key.ts b/src/services/common/did/did-key.ts
index c43536b..8b32dde 100644
--- a/src/services/common/did/did-key.ts
+++ b/src/services/common/did/did-key.ts
@@ -1,5 +1,5 @@
 import { DIDResolutionResult, DIDResolver, Resolver } from "did-resolver";
-import {randomBytes} from "crypto"
+import { utils } from 'ethers';
 import { DID, DIDMethod, DIDWithKeys } from "./did";
 import { KeyUtils, KEY_ALG } from "../../../utils";
 import { getResolver } from "key-did-resolver";
@@ -15,7 +15,7 @@ export class KeyDIDMethod implements DIDMethod {
       */
     async create(): Promise<DIDWithKeys> {
         const seed = () => {
-            return randomBytes(32)
+            return utils.randomBytes(32)
         }
 
         const key = await Ed25519KeyPair.generate({
diff --git a/src/services/common/schemas/schemas.ts b/src/services/common/schemas/schemas.ts
index d564fc7..ced3bbc 100644
--- a/src/services/common/schemas/schemas.ts
+++ b/src/services/common/schemas/schemas.ts
@@ -1,7 +1,8 @@
-
-import { validate } from 'jsonschema'
+import Ajv from 'ajv'
+import addFormats from "ajv-formats"
 import { SchemaValidationFailureError } from '../../../errors'
 import { HelperUtils } from '../../../utils/HelperUtils'
+// import jsonSchemaDraft07 from 'ajv/dist/refs/json-schema-draft-07.json'
 
 export class SchemaManager {
 
@@ -9,7 +10,7 @@ export class SchemaManager {
      * Reads in a [JSON schema](https://json-schema.org/specification-links.html#draft-7) 
      * for a Verifiable Credential from a remote location
      * 
-     * Once retrieved from the remote location, the schema will be validated using `jsonschema`
+     * Once retrieved from the remote location, the schema will be validated using `ajv`
      * 
      * @param schemaLocation - the remote location of the schema file
      * @returns a `Promise` that resolves to a Verifiable Credential {@link JsonSchema} object.
@@ -29,7 +30,7 @@ export class SchemaManager {
      * Reads in a [JSON schema](https://json-schema.org/specification-links.html#draft-7) 
      * for a Verifiable Credential from a local file location
      * 
-     * Once retrieved from the location, the schema will be validated using jsonschema
+     * Once retrieved from the location, the schema will be validated using 'ajv'
      * 
      * @param schemaLocation - the file path of the schema file
      * @returns a `Promise` that resolves to a Verifiable Credential {@link JsonSchema} object.
@@ -66,9 +67,9 @@ export class SchemaManager {
         }
         const spec = await HelperUtils.axiosHelper(schemaUrl)
         if(typeof spec === 'object') {
-            return spec
+            return spec.data ? spec.data : spec
         }
-        return HelperUtils.parseJSON(spec)          
+        return HelperUtils.parseJSON(spec)         
     }
 
     /**
@@ -82,7 +83,10 @@ export class SchemaManager {
      */
     static async validateSchema(schema: JsonSchema): Promise<boolean> {
         const schemaSpec = await this.getSchemaSpec(schema)
-        return validate(schema, schemaSpec, {throwError: true}).valid
+        const ajv = new Ajv({ meta: false })
+        addFormats(ajv)
+        const validate = ajv.compile(schemaSpec)
+        return validate(schema)
     }
 
     /**
@@ -91,7 +95,7 @@ export class SchemaManager {
      * [`credentialSchema`](https://www.w3.org/TR/vc-data-model/#data-schemas) defined 
      * in the Verifiable Credential
      * 
-     * `validate` from jsonschema is used to do the schema validation
+     * `validate` from ajv is used to do the schema validation
      * 
      * Verifying the `credentialSubject` structure is a check the Verifier can perform
      * to validate a Verifiable Credential
@@ -99,11 +103,12 @@ export class SchemaManager {
      * 
      * @param credentialSubject the data object to be validated
      * @param schema the `JsonSchema` that the `credentialSubject` should conform to
-     * @returns a `Promise` that resolves to if the validation succeeded. 
-     * Throws jsonschema ValidationError if something goes wrong
+     * @returns `boolean` that indicates if the validation succeeded. 
      */
     static validateCredentialSubject(credentialSubject: object, schema: JsonSchema): boolean {
-        return validate(credentialSubject, schema, {throwError: true}).valid
+        const ajv = new Ajv()
+        const validate = ajv.compile(schema)
+        return validate(credentialSubject)
     }
 }
 
diff --git a/src/services/common/signatures/jwt.ts b/src/services/common/signatures/jwt.ts
index bae3299..affe104 100644
--- a/src/services/common/signatures/jwt.ts
+++ b/src/services/common/signatures/jwt.ts
@@ -4,7 +4,7 @@ import { CredentialPayload, PresentationPayload, createVerifiableCredentialJwt,
 import { ES256KSigner, hexToBytes, EdDSASigner } from 'did-jwt'
 import { KEY_ALG } from "../../../utils";
 import { isString } from 'lodash'
-import {decode} from 'jsonwebtoken';
+import { decodeJwt, decodeProtectedHeader } from 'jose';
 
 export class JWTService implements SignatureService {
     name = 'JWT'
@@ -97,7 +97,10 @@ export class JWTService implements SignatureService {
      * @return decoded JWT object {header, payload, signature}
      */
     decodeJWT(token: JWT) {
-        return decode(token, {complete:true})
+        const header = decodeProtectedHeader(token)
+        const payload = decodeJwt(token);
+        const signature = token.split('.')[2]
+        return { header, payload, signature }
     }
 }
 
diff --git a/src/services/issuer/credential.ts b/src/services/issuer/credential.ts
index 6c9b641..a9f24f3 100644
--- a/src/services/issuer/credential.ts
+++ b/src/services/issuer/credential.ts
@@ -1,6 +1,5 @@
 import { DEFAULT_CONTEXT, DID, DIDMethod, DIDWithKeys, JWTService, SCHEMA_VALIDATOR, VERIFIABLE_CREDENTIAL } from "../common";
 import { CreateCredentialOptions, CredentialPayload, VerifiableCredential } from 'did-jwt-vc'
-import { JWTPayload } from "did-jwt";
 
 /**
  * Creates a {@link CredentialPayload} from supplied Issuer DID, subject DID,
@@ -154,8 +153,8 @@ export async function revokeCredential(vcDID: DIDWithKeys, didMethod: DIDMethod)
 export function getIssuerFromVC(vc: VerifiableCredential): DID | undefined {
     const jwtService = new JWTService()
     if(typeof vc === 'string') {
-        const credential = jwtService.decodeJWT(vc)?.payload as JWTPayload
-        return credential.iss
+        const { payload } = jwtService.decodeJWT(vc)
+        return payload.iss
     } else {
         return vc.issuer.id
     }
@@ -170,8 +169,8 @@ export function getIssuerFromVC(vc: VerifiableCredential): DID | undefined {
 export function getSubjectFromVP(vc: VerifiableCredential): DID | undefined {
     const jwtService = new JWTService()
     if(typeof vc === 'string') {
-        const credential = jwtService.decodeJWT(vc)?.payload as JWTPayload
-        return credential.sub as string
+        const { payload } = jwtService.decodeJWT(vc)
+        return payload.sub as string
     } else {
         return vc.credentialSubject.id
     }
diff --git a/src/utils/HelperUtils.ts b/src/utils/HelperUtils.ts
index 77248a4..99fe8ba 100644
--- a/src/utils/HelperUtils.ts
+++ b/src/utils/HelperUtils.ts
@@ -29,6 +29,10 @@ export class HelperUtils {
      * Throws `ReadFileJsonFailureError` if reading or parsing fails
      */
     static async fileReaderJSON(location: string) {
+        if (typeof window !== 'undefined') {
+            // Check if we are in a browser env
+            throw Error(`Operation 'fileReaderJSON' not supported in browser enviroment`)
+        }
         try {
             const fileText = fs.readFileSync(location, 'utf-8');
             return HelperUtils.parseJSON(fileText)
diff --git a/tests/unit/schemas/schemas.test.ts b/tests/unit/schemas/schemas.test.ts
index 57ac08b..02ece5b 100644
--- a/tests/unit/schemas/schemas.test.ts
+++ b/tests/unit/schemas/schemas.test.ts
@@ -1,4 +1,3 @@
-import { ValidationError } from "jsonschema";
 import { AxiosRequestFailureError, JsonParseError, ReadFileJsonFailureError, SchemaValidationFailureError } from "../../../src/errors";
 import { SchemaManager } from "../../../src/services/common";
 import { HelperUtils } from "../../../src/utils";
@@ -110,10 +109,8 @@ describe('schema utilities', () => {
     })
 
     it('Rejects a credential subject with additional properties', async () => {
-
-        expect(() => SchemaManager.validateCredentialSubject(
-            {...nameCredentialSubject, id: "did:key:123"}, nameSchema))
-            .toThrowError(ValidationError)
+        const result = await SchemaManager.validateCredentialSubject({...nameCredentialSubject, id: "did:key:123"}, nameSchema)
+        expect(result).toEqual(false);
     })
 
     //can we test mixing schema draft specs??
@@ -175,15 +172,15 @@ describe('schema utilities', () => {
             minProperties: { '$ref': '#/definitions/nonNegativeIntegerDefault0' },
             required: { '$ref': '#/definitions/stringArray' },
             additionalProperties: { '$ref': '#' },
-            definitions: { type: 'object', additionalProperties: [Object], default: {} },
-            properties: { type: 'object', additionalProperties: [Object], default: {} },
+            definitions: { type: 'object', additionalProperties: { '$ref': '#' }, default: {} },
+            properties: { type: 'object', additionalProperties: { '$ref': '#' }, default: {} },
             patternProperties: {
                 type: 'object',
-                additionalProperties: [Object],
-                propertyNames: [Object],
+                additionalProperties: { '$ref': '#' },
+                propertyNames: { '$ref': '#' },
                 default: {}
             },
-            dependencies: { type: 'object', additionalProperties: [Object] },
+            dependencies: { type: 'object', additionalProperties: { '$ref': '#' } },
             propertyNames: { '$ref': '#' },
             const: true,
             enum: { type: 'array', items: true, minItems: 1, uniqueItems: true },