diff --git a/package.json b/package.json
index a1b21dfa..a01435f0 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
   ],
   "devDependencies": {
     "google-closure-compiler": "^20170910.0.0",
-    "google-closure-library": "^20170910.0.0",
+    "google-closure-library": "^20200830.0.0",
     "grunt": "^1.0.0",
     "grunt-bower-task": "~0.4.0",
     "grunt-contrib-clean": "~0.6.0",