diff --git a/requirements.txt b/requirements.txt
index f0cc571..6f42623 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 enum34>=1.1.4; python_version < '3.4'
 six>=1.8.0
 requests>=2.4.3
-optionaldict>=0.1.0
\ No newline at end of file
+optionaldict>=0.1.0
+urllib3>=2.6.3 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file