diff --git a/src/slack/requirements.txt b/src/slack/requirements.txt
index f229360..c6dcbdf 100644
--- a/src/slack/requirements.txt
+++ b/src/slack/requirements.txt
@@ -1 +1,2 @@
 requests
+urllib3>=2.2.2 # not directly required, pinned by Snyk to avoid a vulnerability