diff --git a/package.json b/package.json
index 5ddc7d1..67469a2 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "snazzy": "^9.0.0",
     "standard": "^17.0.0",
     "tap": "^16.0.0",
-    "tsd": "^0.20.0",
+    "tsd": "^0.21.0",
     "typescript": "^4.4.4",
     "uri-js": "^4.4.1"
   },