diff --git a/docs/requirements.txt b/docs/requirements.txt
index 882137502d..131dc437c9 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -3,3 +3,4 @@ sphinx>3.0.0
 requests
 furo
 sphinx-copybutton
+urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability