diff --git a/package-lock.json b/package-lock.json
index 2caef64..2db375a 100644
--- a/package-lock.json
+++ b/package-lock.json
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+      "resolved": "https://registry.npmjs.org/which-module/-/which-module-1.0.0.tgz",
+      "integrity": "sha1-u6Y8qGGUiZT/MHc2CJ47lgJsKk8="
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+      "integrity": "sha1-2Pw9KE3QV5T+hJc8rs3Rz4JP3YU=",
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+    },
+    "wrappy": {
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+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+    },
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+      "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.1.tgz",
+      "integrity": "sha1-bRX7qITAhnnA136I53WegR4H+kE="
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+      "resolved": "https://registry.npmjs.org/yargs/-/yargs-6.6.0.tgz",
+      "integrity": "sha1-eC7CHvQDNF+DCoCMo9UTr1YGUgg=",
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+        "decamelize": "1.2.0",
+        "get-caller-file": "1.0.2",
+        "os-locale": "1.4.0",
+        "read-pkg-up": "1.0.1",
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+        "which-module": "1.0.0",
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+          "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo="
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+          "integrity": "sha1-MvxLn82vhF/N9+c7uXysImHwqwo="
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diff --git a/package.json b/package.json
index 64b0872..9beb9c7 100644
--- a/package.json
+++ b/package.json
@@ -34,6 +34,7 @@
     "ngx-bootstrap": "1.6.6",
     "rxjs": "5.3.0",
     "ts-helpers": "1.1.2",
+    "webpack-dev-server": "^2.7.1",
     "zone.js": "0.8.9"
   },
   "devDependencies": {