diff --git a/package.json b/package.json
index 450f6c1..102b629 100644
--- a/package.json
+++ b/package.json
@@ -27,6 +27,6 @@
   "devDependencies": {
     "dedent": "^0.6.0",
     "mocha": "^2.4.5",
-    "sequelize": "^3.23.2"
+    "sequelize": "^5.21.1"
   }
 }