diff --git a/Makefile b/Makefile
index 5d78ea5579c2b8ea344fbe5ab2ec0e595f88eea8..2a447c2d56ebbbf80b9f7bbfc578cc868887fd6e 100644
--- a/Makefile
+++ b/Makefile
@@ -31,8 +31,8 @@ all: $(HTML)
 
 deploy: all
 	mkdir -p prog_seq
-	cp *.html  default.revealjs prog_seq
-	cp -r jquery reveal.js js css figs prog_seq
+	rsync -avz *.html  default.revealjs prog_seq
+	rsync -avz jquery reveal.js js css figs prog_seq
 
 clean:
 	rm -rf *.html prog_seq/*