diff --git a/package-lock.json b/package-lock.json
index f3db7e9..6ef6ca5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -120,13 +120,36 @@
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+          "dev": true,
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@@ -329,12 +352,6 @@
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@@ -1428,9 +1445,9 @@
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-      "integrity": "sha1-vPEwUspURj8w+fx+lbmkdjCpSSE=",
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@@ -1624,6 +1641,28 @@
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@@ -2314,15 +2344,23 @@
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@@ -4108,50 +4132,6 @@
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@@ -4432,24 +4412,36 @@
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@@ -4523,6 +4515,12 @@
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@@ -4714,7 +4712,8 @@
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@@ -4765,7 +4764,8 @@
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@@ -4780,6 +4780,7 @@
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@@ -4788,6 +4789,7 @@
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@@ -4796,6 +4798,7 @@
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@@ -4804,7 +4807,8 @@
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@@ -4821,12 +4825,14 @@
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+      "version": "3.3.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-3.3.3.tgz",
+      "integrity": "sha512-nnWLa/NwZSt4KQJu51MYlCcSQ5g7INpOrOMt4XV8j4dqTXdmlUmSHQ8/oLC069ckre0fRsgfvsKwbTdtKLCDkA==",
       "dev": true,
       "requires": {
-        "options": "0.0.6",
-        "ultron": "1.0.2"
+        "async-limiter": "~1.0.0",
+        "safe-buffer": "~5.1.0",
+        "ultron": "~1.1.0"
       }
     },
-    "wtf-8": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/wtf-8/-/wtf-8-1.0.0.tgz",
-      "integrity": "sha1-OS2LotDxw00e4tYw8V0O+2jhBIo=",
-      "dev": true
-    },
     "xml-char-classes": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/xml-char-classes/-/xml-char-classes-1.0.0.tgz",
@@ -14572,9 +14726,9 @@
       "dev": true
     },
     "xmlhttprequest-ssl": {
-      "version": "1.5.3",
-      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.3.tgz",
-      "integrity": "sha1-GFqIjATspGw+QHDZn3tJ3jUomS0=",
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz",
+      "integrity": "sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4=",
       "dev": true
     },
     "xregexp": {
diff --git a/package.json b/package.json
index 3bf1068..afdf256 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "friendly-errors-webpack-plugin": "^1.6.1",
     "html-webpack-plugin": "^2.30.1",
     "inject-loader": "^3.0.0",
-    "karma": "^1.4.1",
+    "karma": "^4.2.0",
     "karma-coverage": "^1.1.1",
     "karma-mocha": "^1.3.0",
     "karma-phantomjs-launcher": "^1.0.2",