diff --git a/requirements_py27_dev.txt b/requirements_py27_dev.txt
index 1a293f4..15b4353 100644
--- a/requirements_py27_dev.txt
+++ b/requirements_py27_dev.txt
@@ -3,7 +3,7 @@ appdirs==1.4.0
 appnope==0.1.0
 argh==0.26.2
 astroid==1.4.9
-Babel==2.3.4
+Babel==2.9.1
 backports-abc==0.5
 backports.functools-lru-cache==1.3
 backports.shutil-get-terminal-size==1.0.0
diff --git a/requirements_py3_dev.txt b/requirements_py3_dev.txt
index d1c99f0..6c996f6 100644
--- a/requirements_py3_dev.txt
+++ b/requirements_py3_dev.txt
@@ -3,7 +3,7 @@ appdirs==1.4.0
 appnope==0.1.0
 argh==0.26.2
 astroid==1.4.9
-Babel==2.3.4
+Babel==2.9.1
 backports-abc==0.5
 backports.shutil-get-terminal-size==1.0.0
 bleach==1.5.0