diff --git a/scripts/build.sh b/scripts/build.sh
index fb9062a..ab8a31c 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -1,3 +1,3 @@
-sed -i.old "s/buildDate: [0-9]\+/buildDate: $(date +%m%d%H%M)/" config.yml
+sed -i "s/buildDate: [0-9]\+/buildDate: $(date +%m%d%H%M)/" config.yml
 echo buildDate: $(date +%m%d%H%M)
 hugo