diff --git a/package.json b/package.json
index 6a57e3b..2efe26b 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
 	],
 	"devDependencies": {
 		"ava": "^4.0.1",
-		"tsd": "^0.19.1",
+		"tsd": "^0.31.1",
 		"xo": "^0.54.0"
 	}
 }