diff --git a/conf.py b/conf.py
index 927f3a5980f9c0561f00bb0d82614f4740759aec..59c7f3a9683ee7c107f2cefe22b252e9267fceef 100644
--- a/conf.py
+++ b/conf.py
@@ -78,7 +78,7 @@ LaTeXBuilder.supported_image_types = ['application/pdf', 'image/jpg', 'image/jpe
 
 templates_path = ['_templates']
 
-source_suffix = ['.rst', '.md']
+source_suffix = ['.rst']
 numfig = True
 navigation_with_keys = True