diff --git a/backend/Dockerfile b/backend/Dockerfile
index db03656..0423770 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -7,8 +7,5 @@ RUN pip install --no-cache-dir -r requirements.txt
 
 COPY . .
 
-# Make startup script executable
-RUN chmod +x start.sh
-
-# Run migrations then start server
-CMD ["./start.sh"]
+# Run migrations then start server (shell form handles permissions)
+CMD ["sh", "start.sh"]