diff --git a/requirements.txt b/requirements.txt
index 84286c0..ff7dfe5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ alabaster==0.7.12
 astroid==2.2.5
 atomicwrites==1.3.0
 attrs==19.1.0
-Babel==2.6.0
+Babel==2.9.1
 bcbio-gff==0.6.6
 biopython==1.73
 certifi==2019.3.9