diff --git a/requirements_dev.txt b/requirements_dev.txt
index 5745446..eb68c5d 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,6 +1,6 @@
 alabaster==0.7.12
 appdirs==1.4.3
-Babel==2.9.0
+Babel==2.9.1
 CacheControl==0.12.6
 certifi==2019.11.28
 chardet==3.0.4