diff --git a/ceph-rbd-backup/Dockerfile b/ceph-rbd-backup/Dockerfile
index 3b65f85..a3b6529 100644
--- a/ceph-rbd-backup/Dockerfile
+++ b/ceph-rbd-backup/Dockerfile
@@ -1,5 +1,11 @@
 FROM quay.io/ceph/ceph:v20.2
 
+RUN dnf clean all \
+    && rm -rf /var/cache/dnf \
+    && dnf install -y zstd \
+    && dnf clean all \
+    && rm -rf /var/cache/dnf
+
 COPY script.sh /script.sh
 
 ENTRYPOINT ["/bin/bash", "/script.sh"]