diff --git a/package-lock.json b/package-lock.json
index e1c7f949b5..18b8846d8b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1313,9 +1313,9 @@
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     },
     "@webcomponents/webcomponentsjs": {
-      "version": "2.2.6",
-      "resolved": "https://registry.npmjs.org/@webcomponents/webcomponentsjs/-/webcomponentsjs-2.2.6.tgz",
-      "integrity": "sha512-TbuyV7hHIq4jMlvQ8pF3C6QNEqFeBX4be9AND5DO8UCRRYcZBpjl1yH9IChbebeWr1QNcK5WlZC3voAlQCdisQ==",
+      "version": "2.2.7",
+      "resolved": "https://registry.npmjs.org/@webcomponents/webcomponentsjs/-/webcomponentsjs-2.2.7.tgz",
+      "integrity": "sha512-kPPjzV+5kpoWpTniyvBSPcXS33f3j/C6HvNOJ3YecF3pvz3XwVeU4ammbxtVy/osF3z7hr1DYNptIf4oPEvXZA==",
       "dev": true
     },
     "abbrev": {
@@ -20995,7 +20995,7 @@
     },
     "stream-combiner": {
       "version": "0.2.2",
-      "resolved": "http://registry.npmjs.org/stream-combiner/-/stream-combiner-0.2.2.tgz",
+      "resolved": "https://registry.npmjs.org/stream-combiner/-/stream-combiner-0.2.2.tgz",
       "integrity": "sha1-rsjLrBd7Vrb0+kec7YwZEs7lKFg=",
       "dev": true,
       "requires": {
diff --git a/package.json b/package.json
index 3fcebe360a..1ccba888ec 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "@polymer/gen-typescript-declarations": "^1.5.1",
     "@polymer/iron-component-page": "^3.0.0-pre.12",
     "@polymer/test-fixture": "^3.0.0-pre.12",
-    "@webcomponents/webcomponentsjs": "^2.2.6",
+    "@webcomponents/webcomponentsjs": "^2.2.7",
     "babel-eslint": "^7.2.3",
     "babel-preset-minify": "^0.2.0",
     "del": "^3.0.0",