diff --git a/package.json b/package.json
index 06e15ce1..1d3049b3 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "@typescript-eslint/parser": "^2.5.0",
     "apply-loader": "2.0.0",
     "awesome-typescript-loader": "^5.0.0",
-    "core-js": "^3.3.6",
+    "core-js": "^3.4.2",
     "cross-env": "6.0.3",
     "css-loader": "3.2.0",
     "electron": "^7.1.2",
diff --git a/yarn.lock b/yarn.lock
index 99832dbe..63913288 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1556,10 +1556,10 @@ core-js@^2.4.0:
   version "2.4.1"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.4.1.tgz#4de911e667b0eae9124e34254b53aea6fc618d3e"
 
-core-js@^3.3.3, core-js@^3.3.6:
-  version "3.3.6"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.3.6.tgz#6ad1650323c441f45379e176ed175c0d021eac92"
-  integrity sha512-u4oM8SHwmDuh5mWZdDg9UwNVq5s1uqq6ZDLLIs07VY+VJU91i3h4f3K/pgFvtUQPGdeStrZ+odKyfyt4EnKHfA==
+core-js@^3.3.3, core-js@^3.4.2:
+  version "3.4.2"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.4.2.tgz#ee2b1a60b50388d8ddcda8cdb44a92c7a9ea76df"
+  integrity sha512-bUTfqFWtNKWp73oNIfRkqwYZJeNT3lstzZcAkhhiuvDraRSgOH1/+F9ZklbpR4zpdKuo4cpXN8tKP7s61yjX+g==
 
 core-util-is@1.0.2, core-util-is@~1.0.0:
   version "1.0.2"