diff --git a/ext/post b/ext/post
index 9fd7a5a..e844bc7 100755
--- a/ext/post
+++ b/ext/post
@@ -3,7 +3,7 @@
 
 OUTPUT_DIR = File.expand_path("~/projects/fnordig.de/_posts")
 EDITOR = ENV['EDITOR'] || 'vim'
-EXTENSION=".markdown"
+EXTENSION=".md"
 HEADER = <<EOF
 ---
 layout: post