diff --git a/package.json b/package.json
index 4399845..122aef7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk", 
-  "version": "0.15.27-rc.3",
+  "version": "0.15.27-rc.4",
   "description": "Orion Protocol SDK",
   "main": "./lib/esm/index.js",
   "module": "./lib/esm/index.js",
diff --git a/src/services/ReferralSystem/index.ts b/src/services/ReferralSystem/index.ts
index 4216e52..81c698a 100644
--- a/src/services/ReferralSystem/index.ts
+++ b/src/services/ReferralSystem/index.ts
@@ -33,13 +33,13 @@ class ReferralSystem {
   // testing.orionprotocol.io/referral-api вместо обычного
   // testing.orionprotocol.io/bsc-testnet/referral-api, поэтому лишняя часть вырезается
   static getActualApiUrl = (apiUrl: string, env: string) => {
-    if (env !== 'testing') {
-      return `${apiUrl}/referral-api`;
+    if (env === 'testing' || env === 'custom') {
+      const { protocol, hostname } = new URL(apiUrl);
+
+      return `${protocol}//${hostname}/referral-api`;
     }
 
-    const { protocol, hostname } = new URL(apiUrl);
-
-    return `${protocol}//${hostname}/referral-api`;
+    return `${apiUrl}/referral-api`;
   };
 
   getLink = (refererAddress: string) => fetchWithValidation(`${this.apiUrl}/referer/view/link`, linkSchema, {