diff --git a/frontend/src/pages/api/auth/confirm-password-reset.ts b/frontend/src/pages/api/auth/confirm-password-reset.ts
index 924de7d..a6f112f 100644
--- a/frontend/src/pages/api/auth/confirm-password-reset.ts
+++ b/frontend/src/pages/api/auth/confirm-password-reset.ts
@@ -4,7 +4,7 @@ const PB_POCKETBASE_URL = import.meta.env.PB_POCKETBASE_URL || 'http://localhost
 
 const PASSWORD_MIN_LENGTH = 8;
 const PASSWORD_MAX_LENGTH = 12;
-const PASSWORD_REGEX = /^(?=.*[A-Za-z])(?=.*\d)[A-Za-z\d!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]+$/;
+const PASSWORD_REGEX = /^(?=.*[A-Za-z])(?=.*\d)[A-Za-z\d_!@#$%^&*()_+\-=\[\]{};':"\\|,.<>\/?]+$/;
 
 function validatePassword(password: string): { valid: boolean; error?: string } {
   if (!password || password.length < PASSWORD_MIN_LENGTH) {