diff --git a/dev-requirements.txt b/dev-requirements.txt
index 54a64481..7b14b306 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -14,4 +14,7 @@ pytest-asyncio
 pytest-cov
 pytest>=3.3
 requests-mock
+# blacklist urllib3 releases affected by https://github.com/urllib3/urllib3/issues/1683
+# I *think* this should only affect testing, not production
+urllib3!=1.25.4,!=1.25.5
 virtualenv