diff --git a/requirements_docs.txt b/requirements_docs.txt
index 1cb7850..98c48f8 100644
--- a/requirements_docs.txt
+++ b/requirements_docs.txt
@@ -1,6 +1,6 @@
 alabaster==0.7.12
 aniso8601==4.1.0
-Babel==2.6.0
+Babel==2.9.1
 cachetools==3.1.0
 certifi==2019.3.9
 chardet==3.0.4