diff --git a/package.json b/package.json
index fe7627b..366afb0 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,6 @@
     "sinon": "^14.0.0",
     "standard": "^17.0.0",
     "tap": "^16.0.0",
-    "tsd": "^0.20.0"
+    "tsd": "^0.21.0"
   }
 }