diff --git a/requirements.txt b/requirements.txt
index 82085b5d..5c8badaf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,3 +13,4 @@ pymdown-extensions
 mkdocstrings[python]
 ruff
 mike
+pygments>=2.20.0 # not directly required, pinned by Snyk to avoid a vulnerability