diff --git a/gatsby-theme-atom-service/package.json b/gatsby-theme-atom-service/package.json
index cb43b9fb9..708dd13d9 100644
--- a/gatsby-theme-atom-service/package.json
+++ b/gatsby-theme-atom-service/package.json
@@ -30,7 +30,7 @@
     "@stryker-mutator/core": "^3.3.1",
     "@stryker-mutator/html-reporter": "^3.1.0",
     "@stryker-mutator/jest-runner": "^3.1.0",
-    "@stryker-mutator/typescript": "^3.3.1",
+    "@stryker-mutator/typescript": "^4.0.0",
     "@testing-library/react": "^11.2.2",
     "@types/jest": "^26.0.17",
     "@types/react": "^17.0.0",
diff --git a/yarn.lock b/yarn.lock
index e1c492f13..91b3fb347 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2034,16 +2034,10 @@
     "@stryker-mutator/api" "^3.1.0"
     semver "~6.3.0"
 
-"@stryker-mutator/typescript@^3.3.1":
-  version "3.3.1"
-  resolved "https://registry.yarnpkg.com/@stryker-mutator/typescript/-/typescript-3.3.1.tgz#8e5a1ed1623d4ff0cc99fde2815d8a71af20ce74"
-  integrity sha512-fWQSXTiFJ8eVyQdlwN5IUy4nQ5HpzqVmUcCO90EnUX0HSsp7DQlec3hjBgE3X7XNGzTawjVwQlww2Fe91CX/kw==
-  dependencies:
-    "@stryker-mutator/api" "^3.3.1"
-    "@stryker-mutator/util" "^3.3.1"
-    lodash.flatmap "~4.5.0"
-    semver "~6.3.0"
-    tslib "~2.0.0"
+"@stryker-mutator/typescript@^4.0.0":
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/@stryker-mutator/typescript/-/typescript-4.0.0.tgz#55fdb91850a05916daa35361993194046c774631"
+  integrity sha512-dTm8lyDP5HPSOd14ErXXAn6wY6QZMS6UbXPmexesZJeevNZUxRCHZqoTIJIY1a6WBbI2tKJzKuVjXih83jAXBQ==
 
 "@stryker-mutator/util@^3.3.1":
   version "3.3.1"
@@ -10494,7 +10488,7 @@ lodash.every@^4.6.0:
   resolved "https://registry.yarnpkg.com/lodash.every/-/lodash.every-4.6.0.tgz#eb89984bebc4364279bb3aefbbd1ca19bfa6c6a7"
   integrity sha1-64mYS+vENkJ5uzrvu9HKGb+mxqc=
 
-lodash.flatmap@^4.5.0, lodash.flatmap@~4.5.0:
+lodash.flatmap@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.flatmap/-/lodash.flatmap-4.5.0.tgz#ef8cbf408f6e48268663345305c6acc0b778702e"
   integrity sha1-74y/QI9uSCaGYzRTBcaswLd4cC4=