diff --git a/package.json b/package.json
index b880ee2..ce5555e 100644
--- a/package.json
+++ b/package.json
@@ -16,7 +16,7 @@
   "devDependencies": {
     "@teppeis/clutz": "^1.0.27-fb3fc7c.v20190318T233908",
     "google-closure-library": "^20190301.0.0",
-    "patch-package": "^6.4.7",
+    "patch-package": "^6.5.1",
     "typescript": "^3.9.10"
   },
   "homepage": "https://github.com/teppeis/closure-library.d.ts",