diff --git a/package.json b/package.json
index 38a1722..7841499 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   ],
   "devDependencies": {
     "coveralls": "^2.11.2",
-    "flow-bin": "^0.48.0",
+    "flow-bin": "^0.49.1",
     "istanbul": "^0.4.5",
     "jest": "^20.0.4",
     "promise": "^8.0.0",