diff --git a/requirements.txt b/requirements.txt
index 775a7ac..c66063b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ argh==0.26.2
 astor==0.7.1
 atari-py==0.1.7
 attrs==19.1.0
-Babel==2.6.0
+Babel==2.9.1
 baselines==0.1.5
 black==19.3b0
 bleach==1.5.0