diff --git a/requirements.txt b/requirements.txt
index b29dbcc..08b61b0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 alabaster==0.7.10
 asn1crypto==0.23.0
-Babel==2.5.1
+Babel==2.9.1
 beautifulsoup4==4.6.0
 bitarray==0.8.1
 bkcharts==0.2