diff --git a/package.json b/package.json
index 26065a0..79dc85c 100644
--- a/package.json
+++ b/package.json
@@ -48,6 +48,9 @@
     "issueIDURL": "https://github.com/royriojas/mobx-form/issues/{0}",
     "projectName": "mobx-form"
   },
+  "peerDependencies": {
+    "mobx": "5.0.3"
+  },
   "devDependencies": {
     "babel-cli": "6.26.0",
     "babel-plugin-add-module-exports": "0.2.1",