diff --git a/Dockerfile b/Dockerfile
index 43963f3..28491e1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,6 +17,7 @@ RUN set -eux && \
         less \
         bind9-dnsutils \
         unzip \
+        rsync \
     && \
     rm -rf /var/lib/apt/lists/* && \
     rm /etc/ssh/ssh_host_*key* && \