diff --git a/docs/requirements.txt b/docs/requirements.txt
index 287c3c0..fc2f526 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -2,7 +2,7 @@ alabaster==0.7.12
 appdirs==1.4.3
 atomicwrites==1.2.1
 attrs==18.2.0
-Babel==2.6.0
+Babel==2.9.1
 boltons==18.0.1
 certifi==2018.11.29
 chardet==3.0.4
diff --git a/requirements.txt b/requirements.txt
index 467a174..68442bc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,7 +5,7 @@ atomicwrites==1.2.1
 attrs==18.2.0
 azure-datalake-store==0.0.37
 azure-nspkg==3.0.2
-Babel==2.6.0
+Babel==2.9.1
 backcall==0.1.0
 bleach==3.0.2
 boto3==1.9.40