diff --git a/requirements.txt b/requirements.txt
index ac02bfc..f189f5c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 alabaster==0.7.10
-Babel==2.4.0
+Babel==2.9.1
 certifi==2017.4.17
 chardet==3.0.4
 cookies==2.2.1