diff --git a/packages/stryker/package.json b/packages/stryker/package.json
index 24658091fd..3daab5e67a 100644
--- a/packages/stryker/package.json
+++ b/packages/stryker/package.json
@@ -53,7 +53,6 @@
     "stryker": "./bin/stryker"
   },
   "dependencies": {
-    "@types/prettier": "^1.6.0",
     "chalk": "^1.1.1",
     "commander": "^2.9.0",
     "escodegen": "^1.8.0",
@@ -74,6 +73,7 @@
     "typed-rest-client": "^0.10.0"
   },
   "devDependencies": {
+    "@types/prettier": "^1.6.0",
     "@types/commander": "^2.9.0",
     "@types/inquirer": "0.0.33",
     "stryker-api": "^0.9.0"