diff --git a/requirements.txt b/requirements.txt
index cbd39c2..e3766ed 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ aiofiles==0.3.1
 alabaster==0.7.10
 AoikLiveReload==0.1.0
 argh==0.26.2
-Babel==2.4.0
+Babel==2.9.1
 certifi==2017.4.17
 chardet==3.0.4
 docutils==0.13.1