diff --git a/blockly/package-lock.json b/blockly/package-lock.json
index 81cf5487..bf16adb4 100644
--- a/blockly/package-lock.json
+++ b/blockly/package-lock.json
@@ -1835,9 +1835,9 @@
       "optional": true
     },
     "google-closure-library": {
-      "version": "20190121.0.0",
-      "resolved": "https://registry.npmjs.org/google-closure-library/-/google-closure-library-20190121.0.0.tgz",
-      "integrity": "sha512-HkgqoXznjlx375vAYYQDS4Tt+ErrBNZ4D+mSev/8Pd/HlvmADX0CFuiDjZ/mk3ku474kgDoxUwi87O+siENn7w==",
+      "version": "20190301.0.0",
+      "resolved": "https://registry.npmjs.org/google-closure-library/-/google-closure-library-20190301.0.0.tgz",
+      "integrity": "sha512-mpeszbnXpRhXZ0sPqUxBgUmk0RtmzrJRy3KFygp0Ih9JuRUjQTCLhwYQeIlK2vB2lShhY/KUo9E1Z1gvxDFxOQ==",
       "dev": true
     },
     "graceful-fs": {
diff --git a/blockly/package.json b/blockly/package.json
index c8424431..68d4d9e2 100644
--- a/blockly/package.json
+++ b/blockly/package.json
@@ -27,7 +27,7 @@
   "devDependencies": {
     "eslint": "^5.13.0",
     "google-closure-compiler": "^20190121.0.0",
-    "google-closure-library": "^20190121.0.0",
+    "google-closure-library": "^20190301.0.0",
     "gulp": "^3.9.1",
     "gulp-concat": "^2.6.1",
     "gulp-insert": "^0.5.0",