diff --git a/hugo/Dockerfile b/hugo/Dockerfile
index 11f0874..5f31ef7 100644
--- a/hugo/Dockerfile
+++ b/hugo/Dockerfile
@@ -7,6 +7,7 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     openssh-client \
     wget \
     ca-certificates \
+    && apt-get clean \
     && rm -rf /var/lib/apt/lists/*
 COPY hugo.sh /root/hugo.sh
 RUN /bin/sh /root/hugo.sh