diff --git a/bower.json b/bower.json
index 0c1ad0e8f4..b2f988911a 100644
--- a/bower.json
+++ b/bower.json
@@ -21,7 +21,7 @@
   },
   "dependencies": {
     "shadycss": "webcomponents/shadycss#^v1.1.0",
-    "webcomponentsjs": "webcomponents/webcomponentsjs#^v1.0.19"
+    "webcomponentsjs": "webcomponents/webcomponentsjs#^v1.1.0"
   },
   "devDependencies": {
     "web-component-tester": "^6.0.0",
diff --git a/package.json b/package.json
index a57898fcc6..11f12ece3c 100644
--- a/package.json
+++ b/package.json
@@ -11,7 +11,7 @@
     "@polymer/gen-closure-declarations": "^0.4.0",
     "@polymer/gen-typescript-declarations": "^0.3.6",
     "@webcomponents/shadycss": "^1.1.0",
-    "@webcomponents/webcomponentsjs": "^1.0.22",
+    "@webcomponents/webcomponentsjs": "^1.1.0",
     "babel-preset-minify": "^0.2.0",
     "del": "^3.0.0",
     "dom5": "^2.3.0",