diff --git a/docker/Dockerfile.frontend b/docker/Dockerfile.frontend
index e8a9417..97a9143 100644
--- a/docker/Dockerfile.frontend
+++ b/docker/Dockerfile.frontend
@@ -1,5 +1,5 @@
 # Build stage
-FROM node:20-alpine as builder
+FROM node:20-alpine AS builder
 
 WORKDIR /app
 
diff --git a/frontend/src/components/Buckets/CreateBucketDialog.tsx b/frontend/src/components/Buckets/CreateBucketDialog.tsx
index 19743e3..776c5c2 100644
--- a/frontend/src/components/Buckets/CreateBucketDialog.tsx
+++ b/frontend/src/components/Buckets/CreateBucketDialog.tsx
@@ -35,7 +35,7 @@ interface CreateBucketDialogProps {
 
 interface FormData {
   bucketName: string;
-  createUser?: boolean;
+  createUser: boolean;
   username?: string;
   password?: string;
 }
@@ -50,7 +50,7 @@ const schema = yup.object({
     )
     .min(3, 'Minimum 3 characters')
     .max(63, 'Maximum 63 characters'),
-  createUser: yup.boolean().default(true),
+  createUser: yup.boolean().defined().default(true),
   username: yup
     .string()
     .when('createUser', {
@@ -64,6 +64,7 @@ const schema = yup.object({
           )
           .min(3, 'Minimum 3 characters')
           .max(32, 'Maximum 32 characters'),
+      otherwise: (schema) => schema.optional(),
     }),
   password: yup
     .string()
@@ -77,6 +78,7 @@ const schema = yup.object({
             /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)/,
             'Password must contain uppercase, lowercase, and number'
           ),
+      otherwise: (schema) => schema.optional(),
     }),
 });