diff --git a/requirements-doc.txt b/requirements-doc.txt
index 30cf5dca7e1c7..e9971864b0157 100644
--- a/requirements-doc.txt
+++ b/requirements-doc.txt
@@ -1,3 +1,4 @@
 sphinx
 sphinx_gallery
 sphinx_rtd_theme
+pygments>=2.20.0 # not directly required, pinned by Snyk to avoid a vulnerability