diff --git a/dev.requirements.txt b/dev.requirements.txt
index 2abe529..55679f0 100644
--- a/dev.requirements.txt
+++ b/dev.requirements.txt
@@ -1,6 +1,6 @@
 alabaster==0.7.12
 appdirs==1.4.3
-Babel==2.8.0
+Babel==2.9.1
 bleach==3.1.4
 certifi==2019.11.28
 cffi==1.14.0