diff --git a/requirements.txt b/requirements.txt
index 61e20ca..9347183 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ pytest-flask==1.3.0
 
 # Optional: For production deployment
 gunicorn==23.0.0
-eventlet==0.33.3
+eventlet==0.40.3
 
 # Note: OpenSquat is automatically installed in Docker containers
 # For manual installation: git clone https://github.com/atenreiro/opensquat.git