diff --git a/backend/package.json b/backend/package.json
index db5c93c..8fef700 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.14.87",
+  "version": "2.14.88",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {
diff --git a/backend/src/core/proxy-utils/index.js b/backend/src/core/proxy-utils/index.js
index ad2a0c6..4b48c5f 100644
--- a/backend/src/core/proxy-utils/index.js
+++ b/backend/src/core/proxy-utils/index.js
@@ -183,6 +183,9 @@ export const ProxyUtils = {
     parse,
     process,
     produce,
+    isIPv4,
+    isIPv6,
+    isIP,
 };
 
 function tryParse(parser, line) {