diff --git a/requirements.txt b/requirements.txt
index d514163..1f2df00 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
-requests==2.18.4
\ No newline at end of file
+requests==2.18.4
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file