diff --git a/requirements.txt b/requirements.txt
index cddd44abb..e883f71df 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,4 +15,10 @@ psycopg2-binary==2.8.2
 pyjexl==0.2.3
 python-memcached==1.59
 requests==2.21.0
+# urllib3 explicit version requirement. Pin it to below 1.25, as
+# requests doesn't work above that version (and minio would pull
+# in the newest version) Can be removed once the following issue
+# is resolved:
+# https://github.com/kennethreitz/requests/issues/5067
+urllib3>=1.21.1,<1.25
 uwsgi==2.0.18