diff --git a/TreeViz/requirements.txt b/TreeViz/requirements.txt
index e82c1c7..8221cb4 100644
--- a/TreeViz/requirements.txt
+++ b/TreeViz/requirements.txt
@@ -1,4 +1,4 @@
-Babel==2.0
+Babel==2.9.1
 Jinja2==2.8
 Landscape-Client==14.12
 MarkupSafe==0.23