diff --git a/Dockerfile b/Dockerfile
index d0dc528..e333dee 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ USER root
 RUN apt-get update \
     && apt-get install -y --no-install-recommends \
       vim gcc python3-dev \
-    && apt-get autoremove -yqq -purge \
+    && apt-get autoremove -yqq --purge \
     && apt-get clean
 USER airflow