diff --git a/conf/nginx.conf b/conf/nginx.conf
index 9867550..13d7d68 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -35,7 +35,7 @@ location @__NAME__ {
   rewrite ^ __PATH__/app.php/$is_args$args;
 }
 
-#noroot location __PATH__ {
-#noroot  return 301 __PATH__/;
-#noroot }
+#for-subdir location __PATH__ {
+#for-subdir  return 301 __PATH__/;
+#for-subdir }
 
diff --git a/scripts/install b/scripts/install
index d738015..599cfd6 100644
--- a/scripts/install
+++ b/scripts/install
@@ -126,13 +126,12 @@ ynh_mysql_connect_as "$db_name" "$db_pwd" "$db_user"  <<< "UPDATE craue_config_s
 ynh_add_nginx_config
 if [ "$path_url" = "/" ]
 then
-  # Remove prefix on #noroot lines
-	sudo sed --in-place '/#noroot*/d' /etc/nginx/conf.d/$domain.d/$app.conf
   # Replace "//" location (due to nginx template)
-  ynh_replace_string " // " " / " /etc/nginx/conf.d/$domain.d/$app.conf
+  # Prevent from replacing in "http://" expressions by excluding ":" as preceding character
+  sudo sed --in-place "s@\([^:]\)//@\1/@g" /etc/nginx/conf.d/$domain.d/$app.conf
 else
-  # Remove #noroot lines
-	ynh_replace_string "#noroot" "" /etc/nginx/conf.d/$domain.d/$app.conf
+  # Move prefix comment #for-subdir at end of lines
+  sudo sed --in-place "s/#for-subdir\(.*\)/\1 #for-subdir/g" /etc/nginx/conf.d/$domain.d/$app.conf
 fi
 ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"
 
diff --git a/scripts/upgrade b/scripts/upgrade
index e6e98d7..8fef0df 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -116,13 +116,12 @@ ynh_mysql_connect_as "$db_name" "$db_pwd" "$db_user"  <<< "UPDATE craue_config_s
 ynh_add_nginx_config
 if [ "$path_url" = "/" ]
 then
-  # Remove prefix on #noroot lines
-	sudo sed --in-place '/#noroot*/d' /etc/nginx/conf.d/$domain.d/$app.conf
   # Replace "//" location (due to nginx template)
-  ynh_replace_string " // " " / " /etc/nginx/conf.d/$domain.d/$app.conf
+  # Prevent from replacing in "http://" expressions by excluding ":" as preceding character
+  sudo sed --in-place "s@\([^:]\)//@\1/@g" /etc/nginx/conf.d/$domain.d/$app.conf
 else
-  # Remove #noroot lines
-	ynh_replace_string "#noroot" "" /etc/nginx/conf.d/$domain.d/$app.conf
+  # Move prefix comment #for-subdir at end of lines
+  sudo sed --in-place "s/#for-subdir\(.*\)/\1 #for-subdir/g" /etc/nginx/conf.d/$domain.d/$app.conf
 fi
 ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"