diff --git a/package.json b/package.json
index 23ce3ba..c4ba157 100644
--- a/package.json
+++ b/package.json
@@ -41,7 +41,7 @@
 	},
 	"devDependencies": {
 		"ava": "^5.3.1",
-		"tsd": "^0.29.0",
+		"tsd": "^0.31.1",
 		"xo": "^0.56.0"
 	}
 }