diff --git a/package-lock.json b/package-lock.json
index 5357341..f827323 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -313,6 +313,11 @@
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+      "resolved": "https://registry.npmjs.org/ansi-colors/-/ansi-colors-3.2.4.tgz",
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-          "integrity": "sha1-rEaBd8SUNAWgkvyPKXYMb/xiBsA="
+          "integrity": "sha1-rEaBd8SUNAWgkvyPKXYMb/xiBsA=",
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-        "qs": "6.5.2",
-        "raw-body": "2.3.3",
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+        "raw-body": "2.4.0",
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+            "inherits": "2.0.3",
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+            "statuses": ">= 1.5.0 < 2",
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+          "resolved": "https://registry.npmjs.org/qs/-/qs-6.7.0.tgz",
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+        },
+        "setprototypeof": {
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+          "resolved": "https://registry.npmjs.org/setprototypeof/-/setprototypeof-1.1.1.tgz",
+          "integrity": "sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw=="
+        },
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+          "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.5.0.tgz",
+          "integrity": "sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow="
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@@ -2040,11 +2087,18 @@
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+      "resolved": "https://registry.npmjs.org/compressible/-/compressible-2.0.17.tgz",
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       "requires": {
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+        "mime-db": ">= 1.40.0 < 2"
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+          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.40.0.tgz",
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+        }
       }
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@@ -2101,9 +2155,12 @@
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-      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.2.tgz",
-      "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ="
+      "version": "0.5.3",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.3.tgz",
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@@ -2119,9 +2176,9 @@
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-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
-      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s="
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.4.0.tgz",
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       "integrity": "sha1-9dJgKStmDghO/0zbyfCK0yR0SLU="
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+    "default-gateway": {
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+      "resolved": "https://registry.npmjs.org/default-gateway/-/default-gateway-2.7.2.tgz",
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@@ -2562,6 +2628,14 @@
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+      "resolved": "https://registry.npmjs.org/end-of-stream/-/end-of-stream-1.4.1.tgz",
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@@ -2716,9 +2790,9 @@
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@@ -2726,11 +2800,11 @@
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-      "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-0.1.6.tgz",
-      "integrity": "sha1-Cs7ehJ7X3RzMMsgRuxG5RNTykjI=",
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/eventsource/-/eventsource-1.0.7.tgz",
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@@ -2742,6 +2816,34 @@
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+      "resolved": "https://registry.npmjs.org/execa/-/execa-0.10.0.tgz",
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+        "get-stream": "^3.0.0",
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+        "npm-run-path": "^2.0.0",
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@@ -2826,65 +2933,154 @@
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     "yargs-parser": {
-      "version": "4.2.1",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-4.2.1.tgz",
-      "integrity": "sha1-KczqwNxPA8bIe0qfIX3RjJ90hxw=",
+      "version": "10.1.0",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-10.1.0.tgz",
+      "integrity": "sha512-VCIyR1wJoEBZUqk5PA+oOBF6ypbwh5aNB3I50guxAL/quggdfs4TtNHQrSazFA3fYZ+tEqfs0zIGlv0c/rgjbQ==",
       "requires": {
-        "camelcase": "^3.0.0"
+        "camelcase": "^4.1.0"
       },
       "dependencies": {
         "camelcase": {
-          "version": "3.0.0",
-          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-3.0.0.tgz",
-          "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo="
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-4.1.0.tgz",
+          "integrity": "sha1-1UVjW+HjPFQmScaRc+Xeas+uNN0="
         }
       }
     }
diff --git a/package.json b/package.json
index 866ad97..8ab508c 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
     "style-loader": "^0.18.2",
     "validator": "^10.11.0",
     "webpack": "^3.1.0",
-    "webpack-dev-server": "^2.5.1"
+    "webpack-dev-server": "^3.1.11"
   },
   "devDependencies": {
     "@babel/plugin-proposal-class-properties": "^7.4.0"