diff --git a/docs/requirements.txt b/docs/requirements.txt
index f49a81d45688..bbca221a109b 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,3 @@
 sphinx==1.5.1
 sphinxcontrib-httpdomain==1.5.0
+urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability