diff --git a/Dockerfile b/Dockerfile
index e65f657..314e38e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -57,6 +57,7 @@ RUN apt-get update \
         openssl \
         sudo \
         tini \
+    && apt-get clean \
     && rm -rf /var/lib/apt/lists/* \
     && mkdir -p /var/run/sshd /var/lib/k8s-mgmt-pod /etc/ssh/sshd_config.d \
     && useradd --create-home --shell /bin/bash admin \