diff --git a/update_slackmoji/requirements.txt b/update_slackmoji/requirements.txt
index cc698f53..70cd28a3 100644
--- a/update_slackmoji/requirements.txt
+++ b/update_slackmoji/requirements.txt
@@ -3,3 +3,4 @@ PyYAML
 pillow
 python-box
 requests
+urllib3>=2.6.3 # not directly required, pinned by Snyk to avoid a vulnerability