diff --git a/docs/requirements.txt b/docs/requirements.txt
index d2ec97c..fe1a0c6 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,6 +1,6 @@
 alabaster==0.7.12
 appdirs==1.4.4
-Babel==2.8.0
+Babel==2.9.1
 CacheControl==0.12.6
 certifi==2020.4.5.1
 chardet==3.0.4