diff --git a/blog_posts/github-co-authors.md b/blog_posts/github-co-authors.md
index df9d076d2..6bb6f8b4a 100644
--- a/blog_posts/github-co-authors.md
+++ b/blog_posts/github-co-authors.md
@@ -9,7 +9,7 @@ excerpt: Learn how to add multiple authors to a git commit with this quick and e
 
 You can add multiple authors to a git commit, by adding one or more `Co-authored-by` trailers to the commit's message:
 
-```sh
+```shellsession
 $ git commit -m "Refactor usability tests.
 >
 >