diff --git a/package.json b/package.json
index e50f872..df09f36 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
   },
   "devDependencies": {
     "@aureooms/js-itertools": "^3.1.1",
-    "ava": "^0.19.1",
+    "ava": "^0.21.0",
     "babel-cli": "^6.24.1",
     "babel-polyfill": "^6.23.0",
     "babel-preset-latest": "^6.24.1",