diff --git a/package.json b/package.json
index 62a2a05..1b6e8c0 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "openzeppelin-test-helpers": "0.4.3",
     "prettier": "2.2.1",
     "solium": "1.2.5",
-    "truffle": "5.1.65",
+    "truffle": "5.5.6",
     "truffle-assertions": "0.9.2",
     "unlock-abi-1-1": "1.1.1"
   },