diff --git a/requirements.txt b/requirements.txt
index f9fa119..ab2edf8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,5 @@ click
 requests
 random
 json
-tornado
\ No newline at end of file
+tornado
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file