diff --git a/src/markerclusterer.js b/src/markerclusterer.js
index 7d749e9..7f6deff 100755
--- a/src/markerclusterer.js
+++ b/src/markerclusterer.js
@@ -1,6 +1,6 @@
 // ==ClosureCompiler==
 // @compilation_level ADVANCED_OPTIMIZATIONS
-// @externs_url http://closure-compiler.googlecode.com/svn/trunk/contrib/externs/maps/google_maps_api_v3_3.js
+// @externs_url https://raw.githubusercontent.com/google/closure-compiler/master/contrib/externs/maps/google_maps_api_v3.js
 // ==/ClosureCompiler==
 
 /**