diff --git a/package.json b/package.json
index 037ce2c..2254a52 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,9 @@
     "node": ">=8.11.4",
     "yarn": ">=1.6.0"
   },
+  "dependencies": {
+    "identity-obj-proxy": "3.0.0"
+  },
   "devDependencies": {
     "@immowelt/eslint-config-immowelt-react": "2.1.1",
     "@immowelt/jest-preset-node": "1.1.1",
@@ -37,7 +40,6 @@
   "peerDependencies": {
     "enzyme": "^3.1.0",
     "enzyme-adapter-react-16": "^1.0.2",
-    "identity-obj-proxy": "3.0.0",
     "jest": "^23.0.0",
     "babel-jest": "^23.0.0"
   },