diff --git a/requirements-dev.txt b/requirements-dev.txt
index 901dd0f..65dae7d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,7 +5,7 @@ appdirs==1.4.3
 arrow==0.12.1
 atomicwrites==1.1.5
 attrs==18.1.0
-babel==2.6.0
+babel==2.9.1
 binaryornot==0.4.4
 bonobo[dev]==0.6.2
 certifi==2018.4.16