diff --git a/package.json b/package.json
index 07da0f3..870ad7c 100644
--- a/package.json
+++ b/package.json
@@ -30,7 +30,7 @@
     "@aureooms/js-memory": "^4.0.0",
     "@aureooms/js-operator": "^1.0.2",
     "@aureooms/js-type": "^1.0.4",
-    "ava": "^0.19.0",
+    "ava": "^0.21.0",
     "babel-cli": "^6.23.0",
     "babel-polyfill": "^6.23.0",
     "babel-preset-env": "^1.4.0",