diff --git a/api-book/requirements.txt b/api-book/requirements.txt
index 413724e..73f410d 100644
--- a/api-book/requirements.txt
+++ b/api-book/requirements.txt
@@ -3,7 +3,7 @@ altair==4.1.0
 argon2-cffi==20.1.0
 async-generator==1.10
 attrs==20.3.0
-Babel==2.9.0
+Babel==2.9.1
 backcall==0.2.0
 beautifulsoup4==4.9.3
 bleach==3.3.0