diff --git a/package.json b/package.json
index c46f107..29e0b06 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
     "remark-lint": "^6.0.0",
     "remark-preset-lint-recommended": "^3.0.0",
     "tap-spec": "^4.1.1",
-    "testdouble": "3.1.1"
+    "testdouble": "3.5.0"
   },
   "engines": {
     "node": ">=4",