diff --git a/package.json b/package.json
index c9709ac..5282696 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   "devDependencies": {
     "ava": "^0.18.0",
     "coveralls": "^2.11.15",
-    "date-fns": "^1.21.1",
+    "date-fns": "^1.28.1",
     "nyc": "^10.0.0",
     "timekeeper": "^1.0.0",
     "xo": "^0.18.0"