diff --git a/zerops.yml b/zerops.yml
index b4844012..7785896e 100644
--- a/zerops.yml
+++ b/zerops.yml
@@ -20,7 +20,7 @@ zerops:
         - sudo sed -i 's/^\(\s*text\/plain\s\+\)txt;$/\1txt md;/' /etc/nginx/mime.types
       routing:
         headers:
-          - for: "~* \.md$*"
+          - for: "~* \\.md$*"
             values:
               Content-Disposition: '"inline" always'
               X-Content-Type-Options: '"nosniff"'