diff --git a/etc/koha-httpd.conf b/etc/koha-httpd.conf
index 1c6609787a..a527f9ca0d 100644
--- a/etc/koha-httpd.conf
+++ b/etc/koha-httpd.conf
@@ -224,6 +224,9 @@
      # Rewrite Rules
      RewriteEngine On
 
+     # Protect dev install
+     RewriteRule ^/cgi-bin/koha/(C4|debian|docs|etc|installer/data|install_misc|Koha|misc|selenium|t|test|tmp|xt)/|\.PL$ /notfound [PT]
+
      RewriteRule ^/bib/([^\/]*)/?$ /cgi-bin/koha/catalogue/detail.pl?biblionumber=$1 [PT]
      RewriteRule ^/isbn/([^\/]*)/?$ /search?q=isbn:$1 [PT]
      RewriteRule ^/issn/([^\/]*)/?$ /search?q=issn:$1 [PT]