diff --git a/package-lock.json b/package-lock.json
index d4a2392..e241570 100644
--- a/package-lock.json
+++ b/package-lock.json
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@@ -7833,12 +7886,6 @@
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@@ -7887,27 +7928,6 @@
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@@ -7917,66 +7937,22 @@
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+          "resolved": "https://registry.npmjs.org/yargs/-/yargs-13.3.2.tgz",
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-            "decamelize": "^1.2.0",
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             "find-up": "^3.0.0",
-            "get-caller-file": "^1.0.1",
-            "os-locale": "^3.0.0",
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+            "y18n": "^4.0.0",
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@@ -8011,12 +7987,12 @@
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+      "version": "0.7.4",
+      "resolved": "https://registry.npmjs.org/websocket-driver/-/websocket-driver-0.7.4.tgz",
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       "dev": true,
       "requires": {
-        "http-parser-js": ">=0.4.0 <0.4.11",
+        "http-parser-js": ">=0.5.1",
         "safe-buffer": ">=5.1.0",
         "websocket-extensions": ">=0.1.1"
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@@ -8086,9 +8062,9 @@
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+      "version": "6.2.2",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.2.tgz",
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diff --git a/package.json b/package.json
index 5679f72..f0ebf88 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
   "devDependencies": {
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     "webpack-cli": "3.3.10",
-    "webpack-dev-server": "3.9.0",
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     "copy-webpack-plugin": "5.1.0",
     "compression-webpack-plugin": "3.0.1",