diff --git a/src/server/index.js b/src/server/index.js
index 1ecef6c..2449aa6 100644
--- a/src/server/index.js
+++ b/src/server/index.js
@@ -1,6 +1,7 @@
 import http from "node:http";
 import fs from "node:fs";
 import path from "node:path";
+import crypto from "node:crypto";
 import { spawn, spawnSync } from "node:child_process";
 import { settings } from "./config.js";
 import { fetchSubscription } from "./subscription.js";
@@ -625,7 +626,8 @@ async function handleApi(req, res) {
       return sendJson(res, 400, { success: false, error: "Укажите url" });
 
     // Кеш — файл рядом с custom-rule-sets.json
-    const cacheKey = Buffer.from(url).toString("base64url").slice(0, 48);
+    // Используем crypto hash чтобы избежать коллизий при одинаковом префиксе URL
+    const cacheKey = crypto.createHash("sha1").update(url).digest("hex");
     const cacheFile = path.join(
       settings.dataDir,
       `ruleset-cache-${cacheKey}.json`,