diff --git a/requirements/dev.txt b/requirements/dev.txt
index 0e9c3fda4f..5dded0d2e0 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -20,7 +20,7 @@ asn1crypto==0.23.0        # via cryptography
 attrs==17.3.0             # via automat, service-identity
 automat==0.6.0            # via twisted
 aws-xray-sdk==0.94        # via moto
-babel==2.5.1
+babel==2.5.3
 backports-abc==0.5
 backports.ssl-match-hostname==3.5.0.1
 beautifulsoup4==4.6.0
diff --git a/requirements/docs.in b/requirements/docs.in
index 38321384f1..33344778cc 100644
--- a/requirements/docs.in
+++ b/requirements/docs.in
@@ -16,7 +16,7 @@ recommonmark==0.4.0
 
 # Dependencies of Sphinx
 alabaster==0.7.10
-babel==2.5.1
+babel==2.5.3
 # Upgrading to the latest version of CommonMark breaks the
 # compatibility with recommonmark.  See
 # https://github.com/rtfd/recommonmark/issues/24
diff --git a/requirements/docs.txt b/requirements/docs.txt
index d56f552489..5d8547634d 100644
--- a/requirements/docs.txt
+++ b/requirements/docs.txt
@@ -8,7 +8,7 @@
 # For details, see requirements/README.md .
 #
 alabaster==0.7.10
-babel==2.5.1
+babel==2.5.3
 certifi==2017.11.5        # via requests
 chardet==3.0.4            # via requests
 commonmark==0.5.4