diff --git a/requirements.txt b/requirements.txt
index 1a7c72a..3723813 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 click==6.6
 markovify==0.4.0
 requests==2.11.1
-six==1.10.0
+six==1.17.0
 slackclient==1.0.1
 Unidecode==0.4.19
 websocket-client==0.37.0
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 23f65b9..3dca1ad 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -27,7 +27,7 @@ python-dateutil==2.5.3
 pytz==2016.6.1
 PyYAML==3.11
 requests==2.10.0
-six==1.10.0
+six==1.17.0
 slackclient==1.0.1
 snowballstemmer==1.2.1
 Sphinx==1.4.4