diff --git a/requirements.txt b/requirements.txt
index 46c4a64..d5828e4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 alabaster==0.7.12
 atomicwrites==1.2.1
 attrs==18.2.0
-Babel==2.6.0
+Babel==2.9.1
 cachetools==3.0.0
 certifi==2018.10.15
 chardet==3.0.4