1 files changed, 1 insertions, 1 deletions

diff --git a/setup.cfg b/setup.cfg
index e8cd0dfb4..1912fd3cd 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -39,7 +39,7 @@ package_dir =
     =lib
 install_requires =
     importlib-metadata;python_version<"3.8"
-    greenlet;python_version>="3"
+    greenlet != 0.4.17;python_version>="3"
 
 [options.extras_require]
 asyncio =