diff --git a/package.json b/package.json
index 147355e..35016c0 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "ava": "^0.14.0",
     "babel-cli": "^6.11.4",
     "babel-eslint": "^6.1.2",
-    "babel-plugin-syntax-flow": "^6.8.0",
+    "babel-plugin-syntax-flow": "^6.18.0",
     "babel-plugin-transform-decorators-legacy": "^1.3.4",
     "babel-plugin-transform-flow-comments": "^6.8.0",
     "babel-plugin-transform-flow-strip-types": "^6.8.0",