diff --git a/servers/cromwell/requirements-to-freeze.txt b/servers/cromwell/requirements-to-freeze.txt
index f94f6916..e4661503 100644
--- a/servers/cromwell/requirements-to-freeze.txt
+++ b/servers/cromwell/requirements-to-freeze.txt
@@ -2,6 +2,6 @@ connexion == 1.1.13
 python_dateutil == 2.6.0
 typing == 3.5.2.2
 setuptools >= 65.4.1
-gevent==1.3.4
+gevent==23.9
 gunicorn==19.8.1
 ../jm_utils
diff --git a/servers/cromwell/requirements.txt b/servers/cromwell/requirements.txt
index 4fdd7119..05030d67 100644
--- a/servers/cromwell/requirements.txt
+++ b/servers/cromwell/requirements.txt
@@ -4,8 +4,8 @@ click==8.1.3
 clickclick==1.2.2
 connexion==2.14.1
 Flask==2.2.5
-gevent==21.12.0
-greenlet==1.1.3
+gevent==23.9
+greenlet==2.0.2
 gunicorn==20.1.0
 idna==2.7
 inflection==0.3.1