diff --git a/app/utils/Markdown.java b/app/utils/Markdown.java
index f86863ed7..6c29e5c27 100644
--- a/app/utils/Markdown.java
+++ b/app/utils/Markdown.java
@@ -153,7 +153,7 @@ private static String renderWithHighlight(String source, boolean breaks) {
      * @param options
      * @return the rendered result or the source if timeout occurs
      */
-    private static String renderByMarked(@Nonnull String source, Object options) throws InterruptedException {
+    private static String renderByMarked(@Nonnull final String source, final Object options) throws InterruptedException {
         if (source.isEmpty()) {
             return source;
         }