diff --git a/package.json b/package.json
index e1b311616..02a2a856e 100644
--- a/package.json
+++ b/package.json
@@ -72,7 +72,7 @@
     "rimraf": "^2.2.8",
     "server-destroy": "^1.0.1",
     "standard": "^9.0.0",
-    "tap": "^15.1.5",
+    "tap": "^21.0.0",
     "tape": "^4.6.0"
   },
   "greenkeeper": {