diff --git a/google-blockly-for-tutorial/package.json b/google-blockly-for-tutorial/package.json
old mode 100755
new mode 100644
index d843adf..ea4ae8e
--- a/google-blockly-for-tutorial/package.json
+++ b/google-blockly-for-tutorial/package.json
@@ -42,7 +42,7 @@
     "unused": true
   },
   "dependencies": {
-    "google-closure-library": "^20180204.0.0",
+    "google-closure-library": "^20200830.0.0",
     "install": "^0.8.8",
     "npm": "^4.4.4",
     "webdriverio": "^4.6.2"