diff --git a/package.json b/package.json
index 3a21339..8713874 100644
--- a/package.json
+++ b/package.json
@@ -53,7 +53,7 @@
     "@types/uglifyjs-webpack-plugin": "^1.1.0",
     "@types/webpack": "^4.4.2",
     "clean-webpack-plugin": "^0.1.19",
-    "core-js": "^2.5.7",
+    "core-js": "^3.4.8",
     "coveralls": "^3.0.1",
     "dts-bundle": "^0.7.3",
     "jest": "^23.1.0",