diff --git a/package-lock.json b/package-lock.json
index 7353eeb..cbf62aa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.20.60",
+  "version": "0.20.62",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@orionprotocol/sdk",
-      "version": "0.20.60",
+      "version": "0.20.62",
       "hasInstallScript": true,
       "license": "ISC",
       "dependencies": {
diff --git a/package.json b/package.json
index 6d978ba..a5cc917 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@orionprotocol/sdk",
-  "version": "0.20.61",
+  "version": "0.20.62",
   "description": "Orion Protocol SDK",
   "main": "./lib/index.cjs",
   "module": "./lib/index.js",
diff --git a/src/services/BlockchainService/schemas/referralDataSchema.ts b/src/services/BlockchainService/schemas/referralDataSchema.ts
index 115e2a8..4b4674a 100644
--- a/src/services/BlockchainService/schemas/referralDataSchema.ts
+++ b/src/services/BlockchainService/schemas/referralDataSchema.ts
@@ -1,6 +1,6 @@
-import { z } from "zod";
+import { z } from 'zod';
 
 export const referralDataSchema = z.object({
-  referer: z.string(),
+  referer: z.string().nullable(),
   isReferral: z.boolean(),
 });