diff --git a/covid19-notebooks/requirements.txt b/covid19-notebooks/requirements.txt
index c147cdb..0880007 100644
--- a/covid19-notebooks/requirements.txt
+++ b/covid19-notebooks/requirements.txt
@@ -8,3 +8,4 @@ pywaffle
 requests
 scipy
 seaborn
+urllib3>=2.5.0 # not directly required, pinned by Snyk to avoid a vulnerability