diff --git a/backend/src/services/identity-aws-auth/identity-aws-auth-validators.ts b/backend/src/services/identity-aws-auth/identity-aws-auth-validators.ts
index d0c255e9b2..2cc736f1e0 100644
--- a/backend/src/services/identity-aws-auth/identity-aws-auth-validators.ts
+++ b/backend/src/services/identity-aws-auth/identity-aws-auth-validators.ts
@@ -1,7 +1,7 @@
 import { z } from "zod";
 
 const twelveDigitRegex = /^\d{12}$/;
-const arnRegex = /^arn:aws:iam::\d{12}:(user\/[\w+=,.@/-]+|role\/[\w+=,.@/-]+|\*)$/;
+const arnRegex = /^arn:aws:iam::\d{12}:(user\/[a-zA-Z0-9_.@+*/-]+|role\/[a-zA-Z0-9_.@+*/-]+|\*)$/;
 
 export const validateAccountIds = z
   .string()