diff --git a/dbal/development/src/blob/providers/s3-storage.ts b/dbal/development/src/blob/providers/s3-storage.ts
index cabc0e7bc..8672dcdfb 100644
--- a/dbal/development/src/blob/providers/s3-storage.ts
+++ b/dbal/development/src/blob/providers/s3-storage.ts
@@ -31,10 +31,13 @@ export class S3Storage implements BlobStorage {
 
   private async initializeS3Client(s3Config: NonNullable<BlobStorageConfig['s3']>) {
     try {
-      // Dynamic import to avoid bundling AWS SDK if not needed
-      const { S3Client } = await import('@aws-sdk/client-s3').catch(() => {
-        throw new Error('@aws-sdk/client-s3 is not installed. Install it to use S3 storage.')
-      })
+      // Dynamic import to avoid bundling AWS SDK if not installed
+      // @ts-ignore - Optional dependency
+      const s3Module = await import('@aws-sdk/client-s3').catch(() => null)
+      if (!s3Module) {
+        throw new Error('@aws-sdk/client-s3 is not installed. Install it with: npm install @aws-sdk/client-s3')
+      }
+      const { S3Client } = s3Module
       
       this.s3Client = new S3Client({
         region: s3Config.region,
diff --git a/frontends/nextjs/next.config.ts b/frontends/nextjs/next.config.ts
index a0f82cbcf..78a59cdd1 100644
--- a/frontends/nextjs/next.config.ts
+++ b/frontends/nextjs/next.config.ts
@@ -82,17 +82,19 @@ const nextConfig: NextConfig = {
     NEXT_PUBLIC_DBAL_WS_URL: process.env.DBAL_WS_URL || 'ws://localhost:50051',
     NEXT_PUBLIC_DBAL_API_KEY: process.env.DBAL_API_KEY || '',
   },
-  webpack(config) {
+  webpack(config, { isServer }) {
     config.resolve.alias = {
       ...config.resolve.alias,
       '@/dbal': path.resolve(__dirname, '../../dbal/development/src'),
       '@dbal-ui': path.resolve(__dirname, '../../dbal/shared/ui'),
     }
     
-    // Mark optional dependencies as external to avoid build errors
-    config.externals = config.externals || []
-    if (Array.isArray(config.externals)) {
-      config.externals.push('@aws-sdk/client-s3')
+    // Ignore optional AWS SDK on client side
+    if (!isServer) {
+      config.resolve.fallback = {
+        ...config.resolve.fallback,
+        '@aws-sdk/client-s3': false,
+      }
     }
     
     return config