diff --git a/requirements.txt b/requirements.txt
index 955900c..13c74d0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ alabaster==0.7.10
 asn1crypto==0.24.0
 aspy.yaml==1.1.0
 attrs==17.4.0
-Babel==2.5.3
+Babel==2.9.1
 bencode.py==2.0.0
 cached-property==1.4.2
 cachetools==2.0.1