diff --git a/package.json b/package.json
index cdf28cf..3ddf574 100644
--- a/package.json
+++ b/package.json
@@ -43,7 +43,7 @@
   "devDependencies": {
     "normalize-url": "^8.0.1",
     "pkgroll": "^1.11.1",
-    "tester": "^1.3.1",
+    "tester": "^2.0.0",
     "tsd": "^0.31.2"
   },
   "dependencies": {