diff --git a/wakatime/stats.py b/wakatime/stats.py
index c23cb24..cee9421 100644
--- a/wakatime/stats.py
+++ b/wakatime/stats.py
@@ -30,6 +30,7 @@ EXTENSIONS = {
     'j2': 'HTML',
     'markdown': 'Markdown',
     'md': 'Markdown',
+    'mdown': 'Markdown',
     'twig': 'Twig',
 }
 TRANSLATIONS = {