diff --git a/requirements_dev.txt b/requirements_dev.txt
index 2b5d8cb..aa65e20 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ appdirs==1.4.3
 argh==0.26.2
 attrs==19.3.0
 autoprotocol==6.1.0
-Babel==2.7.0
+Babel==2.9.1
 backcall==0.1.0
 billiard==3.6.1.0
 bleach==3.1.0