diff --git a/TreeViz/requirements.txt b/TreeViz/requirements.txt
index e82c1c7..f97e42b 100644
--- a/TreeViz/requirements.txt
+++ b/TreeViz/requirements.txt
@@ -109,7 +109,7 @@ testpath==0.2
 thrift-py==0.9.0
 tornado==4.2.1
 traitlets==4.0.0
-urllib3==1.7.1
+urllib3==1.26.5
 virtualenv==13.1.0
 wheel==0.24.0
 workerpool==0.9.4