diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index d85678f..857fa77
--- a/package.json
+++ b/package.json
@@ -68,7 +68,7 @@
     "@types/request": "^2.0.5",
     "@types/utf8": "^2.1.6",
     "codelyzer": "4.2.1",
-    "core-js": "2.5.6",
+    "core-js": "2.6.4",
     "electron": "2.0.3",
     "electron-builder": "20.14.7",
     "electron-reload": "1.2.2",