diff --git a/docs/requirements.txt b/docs/requirements.txt
index 5209692..2142fdb 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,3 @@
 sphinx==7.2.6
 sphinx_rtd_theme==1.3.0
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability