diff --git a/tools/sgmdformat/requirements.txt b/tools/sgmdformat/requirements.txt
index 9aa9bdb7..7a10241d 100644
--- a/tools/sgmdformat/requirements.txt
+++ b/tools/sgmdformat/requirements.txt
@@ -1,3 +1,4 @@
+mdformat==0.7.19
 mdformat-gfm==0.3.7
 mdformat-admon==2.0.6
 mdformat-frontmatter==2.0.8