diff --git a/requirements.txt b/requirements.txt
index 16b7d1fd..79c63b63 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,9 @@ chardet>2.3.0
 wtforms~=3.0
 jsonpath-ng~=1.5.3
 
-dnspython==2.4.0 # related to eventlet fixes
+# Pinned: module 'eventlet.green.select' has no attribute 'epoll'
+# https://github.com/eventlet/eventlet/issues/805#issuecomment-1640463482
+dnspython==2.3.0 # related to eventlet fixes
 
 # jq not available on Windows so must be installed manually