diff --git a/2017/solutions/rllchatbot/requirements.txt b/2017/solutions/rllchatbot/requirements.txt
index d3da83a50..b9ef153ef 100644
--- a/2017/solutions/rllchatbot/requirements.txt
+++ b/2017/solutions/rllchatbot/requirements.txt
@@ -3,7 +3,7 @@ alabaster==0.7.10
 asn1crypto==0.22.0
 astroid==1.5.3
 autopep8==1.3.3
-Babel==2.4.0
+Babel==2.9.1
 backports-abc==0.5
 backports.functools-lru-cache==1.4
 backports.shutil-get-terminal-size==1.0.0