diff --git a/moto/swf/models/workflow_type.py b/moto/swf/models/workflow_type.py
index ddb2475b2..137f0e221 100644
--- a/moto/swf/models/workflow_type.py
+++ b/moto/swf/models/workflow_type.py
@@ -8,6 +8,8 @@ class WorkflowType(GenericType):
             "defaultChildPolicy",
             "defaultExecutionStartToCloseTimeout",
             "defaultTaskStartToCloseTimeout",
+            "defaultTaskPriority",
+            "defaultLambdaRole",
         ]
 
     @property
diff --git a/moto/swf/responses.py b/moto/swf/responses.py
index 98b736cda..2b7794ffd 100644
--- a/moto/swf/responses.py
+++ b/moto/swf/responses.py
@@ -300,6 +300,8 @@ class SWFResponse(BaseResponse):
         default_execution_start_to_close_timeout = self._params.get(
             "defaultExecutionStartToCloseTimeout"
         )
+        default_task_priority = self._params.get("defaultTaskPriority")
+        default_lambda_role = self._params.get("defaultLambdaRole")
         description = self._params.get("description")
 
         self._check_string(domain)
@@ -309,10 +311,10 @@ class SWFResponse(BaseResponse):
         self._check_none_or_string(default_child_policy)
         self._check_none_or_string(default_task_start_to_close_timeout)
         self._check_none_or_string(default_execution_start_to_close_timeout)
+        self._check_none_or_string(default_task_priority)
+        self._check_none_or_string(default_lambda_role)
         self._check_none_or_string(description)
 
-        # TODO: add defaultTaskPriority when boto gets to support it
-        # TODO: add defaultLambdaRole when boto gets to support it
         self.swf_backend.register_type(
             "workflow",
             domain,
@@ -322,6 +324,8 @@ class SWFResponse(BaseResponse):
             default_child_policy=default_child_policy,
             default_task_start_to_close_timeout=default_task_start_to_close_timeout,
             default_execution_start_to_close_timeout=default_execution_start_to_close_timeout,
+            default_task_priority=default_task_priority,
+            default_lambda_role=default_lambda_role,
             description=description,
         )
         return ""
diff --git a/tests/test_swf/responses/test_workflow_types.py b/tests/test_swf/responses/test_workflow_types.py
index 4c92d7762..72aa814d2 100644
--- a/tests/test_swf/responses/test_workflow_types.py
+++ b/tests/test_swf/responses/test_workflow_types.py
@@ -1,7 +1,9 @@
 import sure
 import boto
+import boto3
 
 from moto import mock_swf_deprecated
+from moto import mock_swf
 from boto.swf.exceptions import SWFResponseError
 
 
@@ -133,6 +135,41 @@ def test_describe_workflow_type():
     infos["status"].should.equal("REGISTERED")
 
 
+@mock_swf
+def test_describe_workflow_type_full_boto3():
+    # boto3 required as boto doesn't support all of the arguments
+    client = boto3.client("swf", region_name="us-east-1")
+    client.register_domain(
+        name="test-domain", workflowExecutionRetentionPeriodInDays="2"
+    )
+    client.register_workflow_type(
+        domain="test-domain",
+        name="test-workflow",
+        version="v1.0",
+        description="Test workflow.",
+        defaultTaskStartToCloseTimeout="20",
+        defaultExecutionStartToCloseTimeout="60",
+        defaultTaskList={"name": "foo"},
+        defaultTaskPriority="-2",
+        defaultChildPolicy="ABANDON",
+        defaultLambdaRole="arn:bar",
+    )
+
+    resp = client.describe_workflow_type(
+        domain="test-domain", workflowType={"name": "test-workflow", "version": "v1.0"}
+    )
+    resp["typeInfo"]["workflowType"]["name"].should.equal("test-workflow")
+    resp["typeInfo"]["workflowType"]["version"].should.equal("v1.0")
+    resp["typeInfo"]["status"].should.equal("REGISTERED")
+    resp["typeInfo"]["description"].should.equal("Test workflow.")
+    resp["configuration"]["defaultTaskStartToCloseTimeout"].should.equal("20")
+    resp["configuration"]["defaultExecutionStartToCloseTimeout"].should.equal("60")
+    resp["configuration"]["defaultTaskList"]["name"].should.equal("foo")
+    resp["configuration"]["defaultTaskPriority"].should.equal("-2")
+    resp["configuration"]["defaultChildPolicy"].should.equal("ABANDON")
+    resp["configuration"]["defaultLambdaRole"].should.equal("arn:bar")
+
+
 @mock_swf_deprecated
 def test_describe_non_existent_workflow_type():
     conn = boto.connect_swf("the_key", "the_secret")