diff --git a/requirements/requirements-docs.txt b/requirements/requirements-docs.txt
index e9d4123..1bbff87 100644
--- a/requirements/requirements-docs.txt
+++ b/requirements/requirements-docs.txt
@@ -13,3 +13,4 @@ sphinxext-opengraph
 sphinxcontrib-katex  # math
 pillow>=10.2.0 # not directly required, pinned by Snyk to avoid a vulnerability
 tornado>=6.3.3 # not directly required, pinned by Snyk to avoid a vulnerability
+fonttools>=4.43.0 # not directly required, pinned by Snyk to avoid a vulnerability