diff --git a/package-lock.json b/package-lock.json
index 13226ae..9cc7d10 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -38,7 +38,7 @@
         "@types/node": "^25.2.3",
         "@types/ws": "^8.18.1",
         "ajv": "^8.18.0",
-        "diff": "^8.0.2",
+        "diff": "^9.0.0",
         "eslint": "^10.0.0",
         "eslint-config-prettier": "^10.1.8",
         "eslint-plugin-jest": "^29.0.0",
@@ -4499,9 +4499,9 @@
       }
     },
     "node_modules/diff": {
-      "version": "8.0.4",
-      "resolved": "https://registry.npmjs.org/diff/-/diff-8.0.4.tgz",
-      "integrity": "sha512-DPi0FmjiSU5EvQV0++GFDOJ9ASQUVFh5kD+OzOnYdi7n3Wpm9hWWGfB/O2blfHcMVTL5WkQXSnRiK9makhrcnw==",
+      "version": "9.0.0",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-9.0.0.tgz",
+      "integrity": "sha512-svtcdpS8CgJyqAjEQIXdb3OjhFVVYjzGAPO8WGCmRbrml64SPw/jJD4GoE98aR7r25A0XcgrK3F02yw9R/vhQw==",
       "dev": true,
       "license": "BSD-3-Clause",
       "engines": {
diff --git a/package.json b/package.json
index b6c7b2e..a5f308d 100644
--- a/package.json
+++ b/package.json
@@ -83,7 +83,7 @@
     "@types/node": "^25.2.3",
     "@types/ws": "^8.18.1",
     "ajv": "^8.18.0",
-    "diff": "^8.0.2",
+    "diff": "^9.0.0",
     "eslint": "^10.0.0",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-jest": "^29.0.0",