diff --git a/docs/requirements.txt b/docs/requirements.txt
index d7086ba..06bd5f5 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1,2 @@
 tiingo==0.15.6
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability