diff --git a/requirements-dev.txt b/requirements-dev.txt
index 45fa213..2942087 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -4,7 +4,7 @@ alabaster==0.7.12
 arrow==0.14.2
 atomicwrites==1.3.0
 attrs==19.1.0
-babel==2.7.0
+babel==2.9.1
 binaryornot==0.4.4
 certifi==2019.6.16
 chardet==3.0.4