diff --git a/requirements_docs.txt b/requirements_docs.txt
index b8d9934..e0521d3 100644
--- a/requirements_docs.txt
+++ b/requirements_docs.txt
@@ -4,7 +4,7 @@ attrs==17.4.0
 Autologging==1.1.0
 Automat==0.6.0
 autopep8==1.3.3
-Babel==2.5.3
+Babel==2.9.1
 base58==0.2.5
 bitcoin==1.1.42
 blessings==1.6.1