diff --git a/servers/cromwell/requirements.txt b/servers/cromwell/requirements.txt
index 1aa30608..14571ff4 100644
--- a/servers/cromwell/requirements.txt
+++ b/servers/cromwell/requirements.txt
@@ -23,5 +23,5 @@ requests==2.20.0
 six==1.11.0
 swagger-spec-validator==2.3.1
 typing==3.5.2.2
-urllib3==1.24.3
+urllib3==1.26.5
 Werkzeug==0.14.1