diff --git a/Makefile b/Makefile
index 115a340d45feaea0f250f6a3a05899bb22f97096..5d5198547ac109a91e830a7c545552a26089c929 100644
--- a/Makefile
+++ b/Makefile
@@ -71,7 +71,7 @@ deploy: all
 	cp practical_work/*.html phys/practical_work
 	cp practical_work/*.pdf phys/practical_work
 	ls -ltr
-	cd practical_work/ && tar cvf tp_vec2.tar.gz tp_vec2/ && cp tp_vec2.tar.gz ../phys/practical_work
+	cd practical_work/ && tar czvf tp_vec2.tar.gz tp_vec2/ && cp tp_vec2.tar.gz ../phys/practical_work
 	make -C practical_work/planets
 	cp practical_work/planets/*.pdf phys/planets/
 	cp practical_work/planets/*.html phys/planets/