diff --git a/src/types/message-format.ts b/src/types/message-format.ts
index 655b20d..164f9a1 100644
--- a/src/types/message-format.ts
+++ b/src/types/message-format.ts
@@ -253,7 +253,7 @@ export class HTMLFormatter extends Formatter {
 export class MarkdownFormatter extends Formatter {
   public formatting: Method = {
     code: {start: '`', end: '`'},
-    bold: {start: '**', end: '*'},
+    bold: {start: '**', end: '**'},
     action: {start: '*', end: '*'},
     italics: {start: '*', end: '*'},
     emphasis: {start: '*', end: '*'},