diff --git a/requirements.txt b/requirements.txt
index 9a1f9ee..1dd7d63 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ email-validator
 et-xmlfile
 fastapi>=0.115.5
 # greenlet
-gunicorn
+gunicorn==23.0.0
 h11
 html2text
 httpcore