diff --git a/package.json b/package.json
index a1f9f49..e5a4897 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
 	"devDependencies": {
 		"ava": "^4.3.0",
 		"matcha": "^0.7.0",
-		"tsd": "^0.20.0",
+		"tsd": "0.23.0",
 		"xo": "^0.49.0"
 	},
 	"xo": {