diff --git a/OLPS_python/requirements.txt b/OLPS_python/requirements.txt
index 328ef4a..2e05092 100644
--- a/OLPS_python/requirements.txt
+++ b/OLPS_python/requirements.txt
@@ -2,7 +2,7 @@ alabaster==0.7.12
 asn1crypto==0.24.0
 astroid==2.2.5
 attrs==19.1.0
-Babel==2.6.0
+Babel==2.9.1
 backcall==0.1.0
 beautifulsoup4==4.9.3
 bleach==3.1.0