diff --git a/docs/requirements.txt b/docs/requirements.txt
index e289e8bd7..ada43a8f9 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,3 @@
 sphinxcontrib-autoprogram>=0.1.5
 sphinx>=3.2.1
+pygments>=2.20.0 # not directly required, pinned by Snyk to avoid a vulnerability