diff --git a/package-lock.json b/package-lock.json
index a687e00..460a417 100644
--- a/package-lock.json
+++ b/package-lock.json
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-            "once": "^1.3.1"
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@@ -13105,11 +13545,39 @@
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+          "resolved": "https://registry.npmjs.org/string-width/-/string-width-3.1.0.tgz",
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@@ -13128,24 +13596,75 @@
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+          "dev": true,
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-            "os-locale": "^3.0.0",
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-            "y18n": "^3.2.1 || ^4.0.0",
-            "yargs-parser": "^10.1.0"
+            "y18n": "^4.0.0",
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+          "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-13.1.2.tgz",
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@@ -13188,19 +13707,20 @@
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-      "integrity": "sha1-DK+dLXVdk67gSdS90NP+LMoqJOs=",
+      "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",
+        "http-parser-js": ">=0.5.1",
+        "safe-buffer": ">=5.1.0",
         "websocket-extensions": ">=0.1.1"
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+      "version": "0.1.4",
+      "resolved": "https://registry.npmjs.org/websocket-extensions/-/websocket-extensions-0.1.4.tgz",
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diff --git a/package.json b/package.json
index 933bd4c..79b0f2c 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
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     "webpack": "4.17.0",
     "webpack-cli": "3.1.0",
-    "webpack-dev-server": "3.2.1",
+    "webpack-dev-server": "3.11.1",
     "webpack-md5-hash": "0.0.6"
   }
 }