diff --git a/package.json b/package.json
index 4c556f6..b2a0067 100644
--- a/package.json
+++ b/package.json
@@ -30,6 +30,6 @@
     "lodash": "^4.17.11",
     "racer": "^0.9.3",
     "racer-bundle": "^0.3.0",
-    "sharedb-mingo-memory": "^1.1.0"
+    "sharedb-mingo-memory": "^4.0.1"
   }
 }