diff --git a/Dockerfile.dapper b/Dockerfile.dapper
index 5feb4209..7b063dea 100644
--- a/Dockerfile.dapper
+++ b/Dockerfile.dapper
@@ -35,7 +35,8 @@ RUN echo "Acquire::http { Proxy \"$APTPROXY\"; };" >> /etc/apt/apt.conf.d/01prox
         vim \
         wget \
         xorriso \
-	telnet
+        xz-utils \
+        telnet
 
 ########## Dapper Configuration #####################
 
diff --git a/scripts/tar-images b/scripts/tar-images
index b0f84d2e..bddefbfb 100755
--- a/scripts/tar-images
+++ b/scripts/tar-images
@@ -13,5 +13,5 @@ for i in $IMAGES; do
 done
 
 echo "tar-images: docker save ${IMAGES} > build/images.tar"
-docker save ${IMAGES} > build/images.tar
+docker save ${IMAGES} | xz > build/images.tar
 echo "tar-images: DONE"