diff --git a/package.json b/package.json
index 4eb26b2..43850c3 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
   "homepage": "https://github.com/google/wicked-good-xpath",
   "devDependencies": {
     "google-closure-compiler": "^20160619.0.0",
-    "google-closure-library": "^20160619.0.0",
+    "google-closure-library": "^20200830.0.0",
     "gulp": "^3.9.1"
   }
 }