diff --git a/toil/src/cgcloud/toil/toil_box.py b/toil/src/cgcloud/toil/toil_box.py
index 749cdd7..2477f20 100644
--- a/toil/src/cgcloud/toil/toil_box.py
+++ b/toil/src/cgcloud/toil/toil_box.py
@@ -124,7 +124,7 @@ class ToilBox( ToilBoxSupport ):
     A box with Mesos, the latest stable Toil release and their dependencies installed.
     """
 
-    default_spec = 'toil[aws,mesos,encryption,cwl]==3.3.1'
+    default_spec = 'toil[aws,mesos,encryption,cwl]==3.3.3'
 
     @classmethod
     def get_role_options( cls ):