diff --git a/frontend/src/hooks/useJobStatusWebSocket.ts b/frontend/src/hooks/useJobStatusWebSocket.ts
index 24a2c8a..0eda504 100644
--- a/frontend/src/hooks/useJobStatusWebSocket.ts
+++ b/frontend/src/hooks/useJobStatusWebSocket.ts
@@ -140,10 +140,12 @@ export function useJobStatusWebSocket(
     const protocol = apiUrl.protocol === 'https:' ? 'wss:' : 'ws:';
     const host = apiUrl.host; // Use backend host, not window.location.host
 
-    const basePath = `/api/v1/ws/jobs`;
-    const path = jobId ? `${basePath}/${jobId}` : basePath;
+    // Include pathname from API base URL (e.g., /video-accessibility-back)
+    const apiPathname = apiUrl.pathname.replace(/\/$/, ''); // Remove trailing slash
+    const wsPath = `/api/v1/ws/jobs`;
+    const fullPath = jobId ? `${apiPathname}${wsPath}/${jobId}` : `${apiPathname}${wsPath}`;
     const token = encodeURIComponent(accessToken || '');
-    return `${protocol}//${host}${path}?token=${token}`;
+    return `${protocol}//${host}${fullPath}?token=${token}`;
   }, [jobId, accessToken]);
 
   const handleStatusUpdate = useCallback((update: JobStatusUpdate) => {