diff --git a/package.json b/package.json
index db0ebea..4e04af9 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,7 @@
     "fastify": "^3.8.0",
     "standard": "^16.0.2",
     "tap": "^16.0.0",
-    "tsd": "^0.19.0",
+    "tsd": "^0.20.0",
     "typescript": "^4.0.2"
   },
   "dependencies": {