diff --git a/package.json b/package.json
index 2679936d01..b2eb7c02f0 100644
--- a/package.json
+++ b/package.json
@@ -29,7 +29,7 @@
   },
   "dependencies": {},
   "devDependencies": {
-    "definition-tester": "0.5.0",
+    "definition-tester": "0.5.1",
     "typescript": "1.8.2"
   }
 }