diff --git a/package.json b/package.json
index 2c46770..42a64aa 100644
--- a/package.json
+++ b/package.json
@@ -42,7 +42,7 @@
     "now-build": "npm run build"
   },
   "devDependencies": {
-    "core-js": "^2.5.1",
+    "core-js": "^3.6.4",
     "expect.js": "0.3.x",
     "jquery": "^3.3.1",
     "pre-commit": "1.x",