diff --git a/package.json b/package.json
index 9c41926..137c517 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "safe-buffer": "^5.1.2",
     "standard": "^17.0.0",
     "tape": "^5.0.1",
-    "tsd": "^0.20.0"
+    "tsd": "^0.28.1"
   },
   "scripts": {
     "test:types": "tsd",