diff --git a/requirements.txt b/requirements.txt
index 279d521..d027b3b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,5 +7,5 @@ pyasn1==0.4.4
 pyasn1-modules==0.2.2
 requests==2.19.1
 rsa==3.4.2
-six==1.11.0
+six==1.16.0
 urllib3==1.23