diff --git a/requirements.txt b/requirements.txt
index 0e6968e..d9416e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ redis==3.3.10
 # requests==2.20.0
 # scikit-learn==0.20.0
 # scipy==1.1.0
-six==1.12.0
+six==1.13.0
 slacker==0.13.0
 twython==3.7.0
 untangle==1.1.1