diff --git a/package-lock.json b/package-lock.json
index 5a22e88..2e0f11e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,9 +5,9 @@
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@@ -55,11 +55,6 @@
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@@ -132,9 +122,9 @@
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@@ -169,11 +159,6 @@
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@@ -213,16 +198,23 @@
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-      "resolved": "https://registry.npmjs.org/cssstyle/-/cssstyle-0.2.37.tgz",
-      "integrity": "sha1-VBCXI0yyUTyDzu06zdwn/yeYfVQ=",
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-        "cssom": "0.3.x"
+        "cssom": "~0.3.6"
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+      "dependencies": {
+        "cssom": {
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+          "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.8.tgz",
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+        }
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@@ -233,6 +225,16 @@
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+      "resolved": "https://registry.npmjs.org/data-urls/-/data-urls-2.0.0.tgz",
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@@ -241,10 +243,15 @@
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@@ -262,11 +269,18 @@
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+      "resolved": "https://registry.npmjs.org/domexception/-/domexception-2.0.1.tgz",
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+        "webidl-conversions": "^5.0.0"
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@@ -294,31 +308,31 @@
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-      "integrity": "sha1-De4/7TH81GlhjOc0IJn8GvoL2xM="
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-      "integrity": "sha1-Cr9PHKpbyx96nYrMbepPqqBLrJs="
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@@ -499,11 +513,11 @@
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@@ -542,6 +556,11 @@
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       "version": "1.0.5",
@@ -1094,34 +1236,40 @@
         }
       }
     },
+    "whatwg-mimetype": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-2.3.0.tgz",
+      "integrity": "sha512-M4yMwr6mAnQz76TbJm914+gPpB/nCwvZbJU28cUD6dR004SAxDLOOSUaB1JDRqLtaOV/vi0IC5lEAGFgrjGv/g=="
+    },
     "whatwg-url": {
-      "version": "6.5.0",
-      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-6.5.0.tgz",
-      "integrity": "sha512-rhRZRqx/TLJQWUpQ6bmrt2UV4f0HCQ463yQuONJqC6fO2VoEb1pTYddbe59SkYq87aoM5A3bdhMZiUiVws+fzQ==",
+      "version": "8.7.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-8.7.0.tgz",
+      "integrity": "sha512-gAojqb/m9Q8a5IV96E3fHJM70AzCkgt4uXYX2O7EmuyOnLrViCQlsEBmF9UQIu3/aeAIp2U17rtbpZWNntQqdg==",
       "requires": {
-        "lodash.sortby": "^4.7.0",
-        "tr46": "^1.0.1",
-        "webidl-conversions": "^4.0.2"
+        "lodash": "^4.7.0",
+        "tr46": "^2.1.0",
+        "webidl-conversions": "^6.1.0"
       }
     },
-    "wordwrap": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/wordwrap/-/wordwrap-1.0.0.tgz",
-      "integrity": "sha1-J1hIEIkUVqQXHI0CJkQa3pDLyus="
+    "word-wrap": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ=="
     },
     "ws": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-4.1.0.tgz",
-      "integrity": "sha512-ZGh/8kF9rrRNffkLFV4AzhvooEclrOH0xaugmqGsIfFgOE/pIz4fMc4Ef+5HSQqTEug2S9JZIWDR47duDSLfaA==",
-      "requires": {
-        "async-limiter": "~1.0.0",
-        "safe-buffer": "~5.1.0"
-      }
+      "version": "7.5.8",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.8.tgz",
+      "integrity": "sha512-ri1Id1WinAX5Jqn9HejiGb8crfRio0Qgu8+MtL36rlTA6RLsMdWt1Az/19A2Qij6uSHUMphEFaTKa4WG+UNHNw=="
     },
     "xml-name-validator": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
       "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw=="
+    },
+    "xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw=="
     }
   }
 }
diff --git a/package.json b/package.json
index 19501f0..3698efc 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   "dependencies": {
     "body-parser": "1.18.2",
     "express": "4.16.3",
-    "jsdom": "11.6.2",
+    "jsdom": "16.5.0",
     "request": "2.85.0",
     "cryptiles": ">=4.1.2"
   }