diff --git a/_build/fix_html_title.sh b/_build/fix_html_title.sh
index 3f00e673f..e92ddd4c7 100755
--- a/_build/fix_html_title.sh
+++ b/_build/fix_html_title.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 
-sed -i '' 's|<p>\(title:.*\)author:\(.*\)</p>|\1\
+sed -i 's|<p>\(title:.*\)author:\(.*\)</p>|\1\
 author:\2\
 |' $1