1 files changed, 1 insertions, 1 deletions

diff --git a/filters/about-formatting.sh b/filters/about-formatting.sh
index 892fbeb..d024204 100755
--- a/filters/about-formatting.sh
+++ b/filters/about-formatting.sh
@@ -19,7 +19,7 @@
 
 cd "$(dirname $0)/html-converters/"
 case "$(printf '%s' "$1" | tr '[:upper:]' '[:lower:]')" in
-        *.md|*.mkd) exec ./md2html; ;;
+        *.markdown|*.mdown|*.md|*.mkd) exec ./md2html; ;;
         *.rst) exec ./rst2html; ;;
         *.[1-9]) exec ./man2html; ;;
         *.htm|*.html) exec cat; ;;