diff --git a/Dockerfile b/Dockerfile
index 9d82beb..5db6874 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ COPY requirements.txt .
 
 RUN pip install --user -r requirements.txt 
 
-FROM python:3.9-slim
+FROM python:3.13.0a3-slim
 WORKDIR /app
 COPY --from=builder /root/.local/* /app/.local/
 COPY chksftp.py .