diff --git a/Dockerfile b/Dockerfile
index 8f352ec..4ce0bfa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,11 +17,11 @@ ADD smtp2slack4qnap.py /data/smtp2slack4qnap.py
 ADD start.sh /usr/local/bin/start.sh
 
 RUN pip3 install -r /data/requirements.txt && \
-    chmod 755 /usr/local/bin/start.sh && \
+    chmod 755 /usr/local/bin/start.sh /data/smtp2slack4qnap.py && \
     rm -rf /tmp/src && rm -rf /var/cache/apk/* 
 
 #USER python
 
 EXPOSE 1025
 
-CMD [ "/usr/local/bin/start.sh" ]
+CMD [ "/data/smtp2slack4qnap.py" ]