diff --git a/package.json b/package.json
index 340d3e6..9752675 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "sharedb": "^6.0.0",
     "sharedb-mingo-memory": "^5.0.0",
     "sinon": "^22.0.0",
-    "sinon-chai": "^3.7.0"
+    "sinon-chai": "^4.0.1"
   },
   "scripts": {
     "lint": "./node_modules/.bin/eslint .",