diff --git a/Dockerfile b/Dockerfile
index 5f1ccc0..b2a8c76 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,7 +19,7 @@ RUN zypper -n in tar wget gzip && \
 
 RUN wget https://github.com/smallstep/cli/releases/download/v$STEP_VERSION/step_linux_$STEP_VERSION_amd64.tar.gz && \
     mkdir -p /step/bin && \
-    tar -xxvf step_linux_$STEP_VERSION_amd64.tar.gz -C /step/bin/
+    tar -zxvf step_linux_$STEP_VERSION_amd64.tar.gz -C /step/bin/
 RUN rm step_linux_$STEP_VERSION_amd64.tar.gz
 
 EXPOSE 9000/tcp