diff --git a/package-lock.json b/package-lock.json
index 6041299..96dfb9b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,7 +17,7 @@
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@@ -58,14 +58,15 @@
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@@ -74,18 +75,20 @@
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@@ -94,9 +97,10 @@
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@@ -330,18 +334,29 @@
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+      "dev": true,
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-        "cssom": "0.3.x"
+        "cssom": "~0.3.6"
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+      "engines": {
+        "node": ">=8"
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+    "node_modules/cssstyle/node_modules/cssom": {
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+      "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.8.tgz",
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+    },
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@@ -354,23 +369,17 @@
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@@ -382,6 +391,12 @@
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@@ -417,11 +432,24 @@
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+        "webidl-conversions": "^5.0.0"
+      },
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+        "node": ">=8"
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+    "node_modules/domexception/node_modules/webidl-conversions": {
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+      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-5.0.0.tgz",
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+      "dev": true,
+      "engines": {
+        "node": ">=8"
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@@ -448,12 +476,13 @@
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+      "resolved": "https://registry.npmjs.org/escodegen/-/escodegen-2.0.0.tgz",
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@@ -462,7 +491,7 @@
         "esgenerate": "bin/esgenerate.js"
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-        "node": ">=4.0"
+        "node": ">=6.0"
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@@ -481,9 +510,10 @@
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@@ -531,7 +561,7 @@
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@@ -643,11 +673,15 @@
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@@ -705,6 +739,12 @@
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@@ -736,42 +776,63 @@
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+      "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-4.0.0.tgz",
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@@ -817,7 +878,7 @@
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@@ -840,7 +901,7 @@
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@@ -866,6 +927,197 @@
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+          "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-4.0.2.tgz",
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@@ -2317,9 +2838,10 @@
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@@ -2363,7 +2885,7 @@
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-      "integrity": "sha1-IZMqVJ9eUv/ZqCf1cOBL5iqX2lQ="
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@@ -2473,6 +2995,15 @@
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+      "resolved": "https://registry.npmjs.org/saxes/-/saxes-5.0.1.tgz",
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+      "requires": {
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@@ -2539,11 +3070,12 @@
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-      "integrity": "sha1-qLE/1r/SSJUZZ0zN5VujaTtwbQk=",
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-      "integrity": "sha1-WITKtRLPHTVeP7eE8wgEsrUg23I=",
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@@ -2573,6 +3105,12 @@
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       "dev": true
     },
+    "universalify": {
+      "version": "0.1.2",
+      "resolved": "https://registry.npmjs.org/universalify/-/universalify-0.1.2.tgz",
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@@ -2622,10 +3160,20 @@
         "browser-process-hrtime": "^1.0.0"
       }
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+    "w3c-xmlserializer": {
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+      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-2.0.0.tgz",
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+      "dev": true,
+      "requires": {
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-      "version": "4.0.2",
-      "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-4.0.2.tgz",
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+      "version": "6.1.0",
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@@ -2641,13 +3189,14 @@
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+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-8.7.0.tgz",
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-        "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"
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@@ -2662,12 +3211,11 @@
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-      "requires": {
-        "async-limiter": "~1.0.0"
-      }
+      "version": "7.5.8",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.8.tgz",
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@@ -2689,6 +3237,12 @@
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       "integrity": "sha1-Ey7mPS7FVlxVfiD0wi35rKaGsQ0=",
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+    },
+    "xmlchars": {
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+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
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+      "dev": true
     }
   }
 }
diff --git a/package.json b/package.json
index aff174d..5b211f0 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "aws-sdk": "^2.1.27",
     "chai": "^4.1.2",
     "colors": "^1.1.2",
-    "jsdom": "^11.11.0",
+    "jsdom": "^16.5.0",
     "mocha": "^5.1.1",
     "sinon": "^5.0.7"
   },