diff --git a/docs/requirements.txt b/docs/requirements.txt
index d5ea9960..529bd6fe 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -13,3 +13,4 @@ myst-parser
 sphinx_rtd_theme
 
 numpy>=1.22.2 # not directly required, pinned by Snyk to avoid a vulnerability
+pillow>=10.2.0 # not directly required, pinned by Snyk to avoid a vulnerability