diff --git a/deconst-requirements.txt b/deconst-requirements.txt
index ce42055..b3f11f5 100644
--- a/deconst-requirements.txt
+++ b/deconst-requirements.txt
@@ -1,5 +1,5 @@
 alabaster==0.7.9
-Babel==2.3.4
+Babel==2.9.1
 backports-abc==0.4
 backports.ssl-match-hostname==3.5.0.1
 certifi==2016.2.28
diff --git a/style-guide/deconst-requirements.txt b/style-guide/deconst-requirements.txt
index 5a40e70..cb9c08c 100644
--- a/style-guide/deconst-requirements.txt
+++ b/style-guide/deconst-requirements.txt
@@ -1,5 +1,5 @@
 alabaster==0.7.9
-Babel==2.3.4
+Babel==2.9.1
 backports-abc==0.4
 backports.ssl-match-hostname==3.5.0.1
 certifi==2016.2.28