diff --git a/package.json b/package.json
index f4d6e63..a86f6d0 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "@aureooms/js-itertools": "^3.1.1"
   },
   "devDependencies": {
-    "ava": "^0.19.1",
+    "ava": "^0.21.0",
     "babel-cli": "^6.18.0",
     "babel-polyfill": "^6.16.0",
     "babel-preset-latest": "^6.16.0",