diff --git a/package-lock.json b/package-lock.json
index dd9830627..73706e064 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13,7 +13,7 @@
         "./packages/*"
       ],
       "dependencies": {
-        "lit": "^2.7.6"
+        "lit": "^3.1.0"
       },
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         "@babel/core": "7.23.0",
@@ -4125,8 +4125,9 @@
       "dev": true
     },
     "node_modules/@lit-labs/ssr-dom-shim": {
-      "version": "1.1.1",
-      "license": "BSD-3-Clause"
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@lit-labs/ssr-dom-shim/-/ssr-dom-shim-1.1.2.tgz",
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     "node_modules/@lit/reactive-element": {
       "version": "1.6.3",
@@ -5901,6 +5902,28 @@
         "lit-html": "^2.0.0"
       }
     },
+    "node_modules/@open-wc/testing-helpers/node_modules/lit": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/lit/-/lit-2.8.0.tgz",
+      "integrity": "sha512-4Sc3OFX9QHOJaHbmTMk28SYgVxLN3ePDjg7hofEft2zWlehFL3LiAuapWc4U/kYwMYJSh2hTCPZ6/LIC7ii0MA==",
+      "dev": true,
+      "dependencies": {
+        "@lit/reactive-element": "^1.6.0",
+        "lit-element": "^3.3.0",
+        "lit-html": "^2.8.0"
+      }
+    },
+    "node_modules/@open-wc/testing-helpers/node_modules/lit-element": {
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/lit-element/-/lit-element-3.3.3.tgz",
+      "integrity": "sha512-XbeRxmTHubXENkV4h8RIPyr8lXc+Ff28rkcQzw3G6up2xg5E8Zu1IgOWIwBLEQsu3cOVFqdYwiVi0hv0SlpqUA==",
+      "dev": true,
+      "dependencies": {
+        "@lit-labs/ssr-dom-shim": "^1.1.0",
+        "@lit/reactive-element": "^1.3.0",
+        "lit-html": "^2.8.0"
+      }
+    },
     "node_modules/@pkgjs/parseargs": {
       "version": "0.11.0",
       "dev": true,
@@ -21965,21 +21988,39 @@
       }
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     "node_modules/lit": {
-      "version": "2.8.0",
-      "license": "BSD-3-Clause",
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/lit/-/lit-3.1.0.tgz",
+      "integrity": "sha512-rzo/hmUqX8zmOdamDAeydfjsGXbbdtAFqMhmocnh2j9aDYqbu0fjXygjCa0T99Od9VQ/2itwaGrjZz/ZELVl7w==",
       "dependencies": {
-        "@lit/reactive-element": "^1.6.0",
-        "lit-element": "^3.3.0",
-        "lit-html": "^2.8.0"
+        "@lit/reactive-element": "^2.0.0",
+        "lit-element": "^4.0.0",
+        "lit-html": "^3.1.0"
       }
     },
     "node_modules/lit-element": {
-      "version": "3.3.3",
-      "license": "BSD-3-Clause",
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/lit-element/-/lit-element-4.0.2.tgz",
+      "integrity": "sha512-/W6WQZUa5VEXwC7H9tbtDMdSs9aWil3Ou8hU6z2cOKWbsm/tXPAcsoaHVEtrDo0zcOIE5GF6QgU55tlGL2Nihg==",
       "dependencies": {
-        "@lit-labs/ssr-dom-shim": "^1.1.0",
-        "@lit/reactive-element": "^1.3.0",
-        "lit-html": "^2.8.0"
+        "@lit-labs/ssr-dom-shim": "^1.1.2",
+        "@lit/reactive-element": "^2.0.0",
+        "lit-html": "^3.1.0"
+      }
+    },
+    "node_modules/lit-element/node_modules/@lit/reactive-element": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@lit/reactive-element/-/reactive-element-2.0.2.tgz",
+      "integrity": "sha512-SVOwLAWUQg3Ji1egtOt1UiFe4zdDpnWHyc5qctSceJ5XIu0Uc76YmGpIjZgx9YJ0XtdW0Jm507sDvjOu+HnB8w==",
+      "dependencies": {
+        "@lit-labs/ssr-dom-shim": "^1.1.2"
+      }
+    },
+    "node_modules/lit-element/node_modules/lit-html": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/lit-html/-/lit-html-3.1.0.tgz",
+      "integrity": "sha512-FwAjq3iNsaO6SOZXEIpeROlJLUlrbyMkn4iuv4f4u1H40Jw8wkeR/OUXZUHUoiYabGk8Y4Y0F/rgq+R4MrOLmA==",
+      "dependencies": {
+        "@types/trusted-types": "^2.0.2"
       }
     },
     "node_modules/lit-html": {
@@ -21989,6 +22030,22 @@
         "@types/trusted-types": "^2.0.2"
       }
     },
+    "node_modules/lit/node_modules/@lit/reactive-element": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/@lit/reactive-element/-/reactive-element-2.0.2.tgz",
+      "integrity": "sha512-SVOwLAWUQg3Ji1egtOt1UiFe4zdDpnWHyc5qctSceJ5XIu0Uc76YmGpIjZgx9YJ0XtdW0Jm507sDvjOu+HnB8w==",
+      "dependencies": {
+        "@lit-labs/ssr-dom-shim": "^1.1.2"
+      }
+    },
+    "node_modules/lit/node_modules/lit-html": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/lit-html/-/lit-html-3.1.0.tgz",
+      "integrity": "sha512-FwAjq3iNsaO6SOZXEIpeROlJLUlrbyMkn4iuv4f4u1H40Jw8wkeR/OUXZUHUoiYabGk8Y4Y0F/rgq+R4MrOLmA==",
+      "dependencies": {
+        "@types/trusted-types": "^2.0.2"
+      }
+    },
     "node_modules/load-json-file": {
       "version": "7.0.1",
       "dev": true,
@@ -32545,7 +32602,7 @@
       "version": "1.6.0-rc.1",
       "license": "MIT",
       "dependencies": {
-        "lit": "^2.3.1"
+        "lit": "^3.1.0"
       }
     },
     "packages/uui-boolean-input": {
@@ -32573,6 +32630,26 @@
         "lit": "^2.2.2"
       }
     },
+    "packages/uui-box/node_modules/lit": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/lit/-/lit-2.8.0.tgz",
+      "integrity": "sha512-4Sc3OFX9QHOJaHbmTMk28SYgVxLN3ePDjg7hofEft2zWlehFL3LiAuapWc4U/kYwMYJSh2hTCPZ6/LIC7ii0MA==",
+      "dependencies": {
+        "@lit/reactive-element": "^1.6.0",
+        "lit-element": "^3.3.0",
+        "lit-html": "^2.8.0"
+      }
+    },
+    "packages/uui-box/node_modules/lit-element": {
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/lit-element/-/lit-element-3.3.3.tgz",
+      "integrity": "sha512-XbeRxmTHubXENkV4h8RIPyr8lXc+Ff28rkcQzw3G6up2xg5E8Zu1IgOWIwBLEQsu3cOVFqdYwiVi0hv0SlpqUA==",
+      "dependencies": {
+        "@lit-labs/ssr-dom-shim": "^1.1.0",
+        "@lit/reactive-element": "^1.3.0",
+        "lit-html": "^2.8.0"
+      }
+    },
     "packages/uui-breadcrumbs": {
       "name": "@umbraco-ui/uui-breadcrumbs",
       "version": "1.6.0-rc.1",
@@ -32744,7 +32821,7 @@
       "version": "1.6.0-rc.1",
       "license": "MIT",
       "dependencies": {
-        "lit": "^2.2.2"
+        "lit": "^3.1.0"
       }
     },
     "packages/uui-dialog": {
@@ -32772,6 +32849,26 @@
         "lit": "^2.2.2"
       }
     },
+    "packages/uui-dialog/node_modules/lit": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/lit/-/lit-2.8.0.tgz",
+      "integrity": "sha512-4Sc3OFX9QHOJaHbmTMk28SYgVxLN3ePDjg7hofEft2zWlehFL3LiAuapWc4U/kYwMYJSh2hTCPZ6/LIC7ii0MA==",
+      "dependencies": {
+        "@lit/reactive-element": "^1.6.0",
+        "lit-element": "^3.3.0",
+        "lit-html": "^2.8.0"
+      }
+    },
+    "packages/uui-dialog/node_modules/lit-element": {
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/lit-element/-/lit-element-3.3.3.tgz",
+      "integrity": "sha512-XbeRxmTHubXENkV4h8RIPyr8lXc+Ff28rkcQzw3G6up2xg5E8Zu1IgOWIwBLEQsu3cOVFqdYwiVi0hv0SlpqUA==",
+      "dependencies": {
+        "@lit-labs/ssr-dom-shim": "^1.1.0",
+        "@lit/reactive-element": "^1.3.0",
+        "lit-html": "^2.8.0"
+      }
+    },
     "packages/uui-file-dropzone": {
       "name": "@umbraco-ui/uui-file-dropzone",
       "version": "1.6.0-rc.1",
@@ -33234,6 +33331,26 @@
         "lit": "^2.2.2"
       }
     },
+    "packages/uui-toast-notification-layout/node_modules/lit": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/lit/-/lit-2.8.0.tgz",
+      "integrity": "sha512-4Sc3OFX9QHOJaHbmTMk28SYgVxLN3ePDjg7hofEft2zWlehFL3LiAuapWc4U/kYwMYJSh2hTCPZ6/LIC7ii0MA==",
+      "dependencies": {
+        "@lit/reactive-element": "^1.6.0",
+        "lit-element": "^3.3.0",
+        "lit-html": "^2.8.0"
+      }
+    },
+    "packages/uui-toast-notification-layout/node_modules/lit-element": {
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/lit-element/-/lit-element-3.3.3.tgz",
+      "integrity": "sha512-XbeRxmTHubXENkV4h8RIPyr8lXc+Ff28rkcQzw3G6up2xg5E8Zu1IgOWIwBLEQsu3cOVFqdYwiVi0hv0SlpqUA==",
+      "dependencies": {
+        "@lit-labs/ssr-dom-shim": "^1.1.0",
+        "@lit/reactive-element": "^1.3.0",
+        "lit-html": "^2.8.0"
+      }
+    },
     "packages/uui-toast-notification/node_modules/@umbraco-ui/uui-css": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/@umbraco-ui/uui-css/-/uui-css-1.4.0.tgz",
@@ -33242,6 +33359,26 @@
         "lit": "^2.2.2"
       }
     },
+    "packages/uui-toast-notification/node_modules/lit": {
+      "version": "2.8.0",
+      "resolved": "https://registry.npmjs.org/lit/-/lit-2.8.0.tgz",
+      "integrity": "sha512-4Sc3OFX9QHOJaHbmTMk28SYgVxLN3ePDjg7hofEft2zWlehFL3LiAuapWc4U/kYwMYJSh2hTCPZ6/LIC7ii0MA==",
+      "dependencies": {
+        "@lit/reactive-element": "^1.6.0",
+        "lit-element": "^3.3.0",
+        "lit-html": "^2.8.0"
+      }
+    },
+    "packages/uui-toast-notification/node_modules/lit-element": {
+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/lit-element/-/lit-element-3.3.3.tgz",
+      "integrity": "sha512-XbeRxmTHubXENkV4h8RIPyr8lXc+Ff28rkcQzw3G6up2xg5E8Zu1IgOWIwBLEQsu3cOVFqdYwiVi0hv0SlpqUA==",
+      "dependencies": {
+        "@lit-labs/ssr-dom-shim": "^1.1.0",
+        "@lit/reactive-element": "^1.3.0",
+        "lit-html": "^2.8.0"
+      }
+    },
     "packages/uui-toggle": {
       "name": "@umbraco-ui/uui-toggle",
       "version": "1.6.0-rc.1",
diff --git a/package.json b/package.json
index 6acf4e60f..74b6b9d0e 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "npm": ">=10.1 < 11"
   },
   "dependencies": {
-    "lit": "^2.7.6"
+    "lit": "^3.1.0"
   },
   "devDependencies": {
     "@babel/core": "7.23.0",
diff --git a/packages/uui-base/package.json b/packages/uui-base/package.json
index 92048aacc..666fa8c75 100644
--- a/packages/uui-base/package.json
+++ b/packages/uui-base/package.json
@@ -27,7 +27,7 @@
     "lib/**/*.js"
   ],
   "dependencies": {
-    "lit": "^2.3.1"
+    "lit": "^3.1.0"
   },
   "scripts": {
     "build": "tsc --build --force && rollup -c rollup.config.js",
diff --git a/packages/uui-css/package.json b/packages/uui-css/package.json
index 0d401d3c9..832bdda2d 100644
--- a/packages/uui-css/package.json
+++ b/packages/uui-css/package.json
@@ -30,7 +30,7 @@
     "lib/**/*.js"
   ],
   "dependencies": {
-    "lit": "^2.2.2"
+    "lit": "^3.1.0"
   },
   "scripts": {
     "build": "npm run build:cssprops && tsc --build --force && rollup -c rollup.config.js",