diff --git a/requirements.txt b/requirements.txt
index 8d65330..920eb12 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 alabaster==0.7.11
-Babel==2.6.0
+Babel==2.9.1
 beautifulsoup4==4.6.0
 certifi==2018.4.16
 chardet==3.0.4