diff --git a/src/core/validations/username.ts b/src/core/validations/username.ts
index 56d83a2a9..3e4f36b96 100644
--- a/src/core/validations/username.ts
+++ b/src/core/validations/username.ts
@@ -1,7 +1,7 @@
 export const MIN_USERNAME_LENGTH = 3;
-export const MAX_USERNAME_LENGTH = 15;
+export const MAX_USERNAME_LENGTH = 20;
 
-const validPattern = /^[a-zA-Z0-9_]+$/; // Alphanumeric and underscores
+const validPattern = /^[a-zA-Z0-9_ ]+$/;
 
 export function validateUsername(username: string): { isValid: boolean; error?: string } {