diff --git a/package.json b/package.json
index 6eb83d3..e2a026a 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "window": "3.1.5"
   },
   "devDependencies": {
-    "ava": "^0.19.0",
+    "ava": "^0.20.0",
     "coveralls": "^2.11.13",
     "eslint": "^4.1.0",
     "eslint-config-lukechilds": "^1.9.0",