diff --git a/scripts/change_url b/scripts/change_url
index e4ce3a9..53cd35d 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -48,15 +48,13 @@ fi
 # Update nginx config
 if [ "$old_domain" != "$domain" ]
 then
-    old_file_path="/etc/nginx/conf.d/$old_domain.d/$app.conf"
-    new_file_path="/etc/nginx/conf.d/$domain.d/$app.conf"
-    mv "$old_file_path" "$new_file_path"
+    # Delete file checksum for the old conf file location
+    ynh_delete_file_checksum "/etc/nginx/conf.d/$old_domain.d/$app.conf"
 
-    # Change the checksum setting name
-    checksum_setting_old_name=checksum_${old_file_path//[\/ ]/_}
-    checksum_setting_new_name=checksum_${new_file_path//[\/ ]/_}
-    checksum_value=$(ynh_app_setting_get $app $checksum_setting_old_name)
-    ynh_app_setting_set $app $checksum_setting_new_name $checksum_value
+    mv "/etc/nginx/conf.d/$old_domain.d/$app.conf" "/etc/nginx/conf.d/$domain.d/$app.conf"
+
+    # Store file checksum for the new config file location
+    ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"
 fi
 ynh_add_nginx_config 'seahub_port fileserver_port webdav_port'
 
diff --git a/scripts/experimental_helper.sh b/scripts/experimental_helper.sh
index 4afaac3..d4e73f5 100644
--- a/scripts/experimental_helper.sh
+++ b/scripts/experimental_helper.sh
@@ -115,4 +115,15 @@ ynh_add_nginx_config () {
 	ynh_store_file_checksum "$finalnginxconf"
 
 	sudo systemctl reload nginx
-}
\ No newline at end of file
+}
+
+# Delete a file checksum from the app settings
+#
+# $app should be defined when calling this helper
+#
+# usage: ynh_remove_file_checksum file
+# | arg: file - The file for which the checksum will be deleted
+ynh_delete_file_checksum () {
+	local checksum_setting_name=checksum_${1//[\/ ]/_}	# Replace all '/' and ' ' by '_'
+	ynh_app_setting_delete $app $checksum_setting_name
+}