diff --git a/package.json b/package.json
index c4db649..e9d4e43 100644
--- a/package.json
+++ b/package.json
@@ -20,7 +20,7 @@
     "yargs": "~3.27.0"
   },
   "devDependencies": {
-    "diff": "~2.1.3"
+    "diff": "~4.0.1"
   },
   "keywords": [
     "defs",