diff --git a/cadence/workflow.py b/cadence/workflow.py
index ea3ecc6..98ddb84 100644
--- a/cadence/workflow.py
+++ b/cadence/workflow.py
@@ -8,7 +8,6 @@
 from typing import Callable, List, Type, Dict, Tuple
 from uuid import uuid4
 
-from six import reraise
 
 from cadence.activity import ActivityCompletionClient
 from cadence.activity_method import RetryParameters, ActivityOptions
diff --git a/requirements.txt b/requirements.txt
index 9d6fbd7..5b30432 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,5 @@
 more-itertools==7.0.0
 ply==3.11
-six==1.12.0
 tblib==1.6.0
 thriftrw==1.7.2
 dataclasses-json==0.3.8
diff --git a/setup.py b/setup.py
index 299424c..febac75 100644
--- a/setup.py
+++ b/setup.py
@@ -17,7 +17,6 @@
         "dataclasses-json>=0.3.8",
         "more-itertools>=7.0.0",
         "ply>=3.11",
-        "six>=1.12.0",
         "tblib>=1.6.0",
         "thriftrw>=1.7.2",
     ],