diff --git a/package.json b/package.json
index 3b30172..f02ac7c 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
     "snazzy": "^9.0.0",
     "standard": "^17.0.0",
     "tap": "^16.0.0",
-    "tsd": "^0.20.0"
+    "tsd": "^0.21.0"
   },
   "dependencies": {
     "abstract-cache": "^1.0.1",