diff --git a/requirements.txt b/requirements.txt
index 5253a3e8..938f1486 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -51,7 +51,7 @@ kazoo==2.6.1
 # for building dependency graph
 snakefood
 
-gevent==1.4.0
+gevent==20.9.0
 redis==2.10.6
 # previous 3.11 has a security issue, which is fixed in at least 4.2b1
 PyYAML==4.2b4