diff --git a/DESIGN.md b/DESIGN.md
index 930e55f..b79ec41 100644
--- a/DESIGN.md
+++ b/DESIGN.md
@@ -106,7 +106,7 @@ contains sequences of chunk hashes and other fixed size fields:
 
 Under the extreme case of the respository remainging unchanged since last backup, no new chunks will be uploaded, as shown by the output of a real run:
 
-```sh
+```
 $ duplicacy backup -stats
 Storage set to sftp://gchen@192.168.1.100/Duplicacy
 Last backup at revision 260 found