diff --git a/externs/closure-compiler.js b/externs/closure-compiler.js
index 21a3e954fd..b9c546b0ae 100644
--- a/externs/closure-compiler.js
+++ b/externs/closure-compiler.js
@@ -30,15 +30,3 @@ Touch.prototype.webkitRadiusX;
 
 /** @type {number} */
 Touch.prototype.webkitRadiusY;
-
-
-
-/**
- * @type {boolean}
- */
-WebGLContextAttributes.prototype.preferLowPowerToHighPerformance;
-
-/**
- * @type {boolean}
- */
-WebGLContextAttributes.prototype.failIfMajorPerformanceCaveat;
diff --git a/package.json b/package.json
index 2eb524b4fa..7ea4215265 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   "dependencies": {
     "async": "0.9.0",
     "browserify": "9.0.3",
-    "closure-util": "1.6.1",
+    "closure-util": "1.7.0",
     "fs-extra": "0.12.0",
     "glob": "5.0.3",
     "graceful-fs": "3.0.2",