diff --git a/package-lock.json b/package-lock.json
index 3f7040c..4c6b75f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6735,9 +6735,9 @@
       }
     },
     "mobx": {
-      "version": "3.1.9",
-      "resolved": "https://registry.npmjs.org/mobx/-/mobx-3.1.9.tgz",
-      "integrity": "sha1-7Ur52HT/YDLHr5H8G4fZ0zEipVc=",
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/mobx/-/mobx-4.2.0.tgz",
+      "integrity": "sha1-7gsKTz2i9HdiJQRqsgisMppIQdQ=",
       "dev": true
     },
     "mocha": {
diff --git a/package.json b/package.json
index 02a28b5..743d7f5 100644
--- a/package.json
+++ b/package.json
@@ -65,7 +65,7 @@
     "eslint": "^3.19.0",
     "eslint-plugin-import": "^2.2.0",
     "istanbul": "^1.1.0-alpha.1",
-    "mobx": "^3.1.9",
+    "mobx": "^4.2.0",
     "mocha": "^3.1.2",
     "rollup": "0.41.6",
     "rollup-plugin-babel": "^2.7.1",
@@ -78,7 +78,7 @@
   },
   "peerDependencies": {
     "router5": "^5.0.0",
-    "mobx": "^3.1.0"
+    "mobx": "^4.0.0"
   },
   "scripts": {
     "commit": "git-cz",