diff --git a/service/history/queue/factory_mock.go b/service/history/queue/factory_mock.go
index 9dca7c0bd10..bc5722b483a 100644
--- a/service/history/queue/factory_mock.go
+++ b/service/history/queue/factory_mock.go
@@ -1,3 +1,25 @@
+// The MIT License (MIT)
+
+// Copyright (c) 2017-2020 Uber Technologies Inc.
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
 // Code generated by MockGen. DO NOT EDIT.
 // Source: factory.go
 //
@@ -12,6 +34,8 @@ package queue
 import (
 	reflect "reflect"
 
+	gomock "go.uber.org/mock/gomock"
+
 	invariant "github.com/uber/cadence/common/reconciliation/invariant"
 	engine "github.com/uber/cadence/service/history/engine"
 	execution "github.com/uber/cadence/service/history/execution"
@@ -20,7 +44,6 @@ import (
 	task "github.com/uber/cadence/service/history/task"
 	workflowcache "github.com/uber/cadence/service/history/workflowcache"
 	archiver "github.com/uber/cadence/service/worker/archiver"
-	gomock "go.uber.org/mock/gomock"
 )
 
 // MockProcessorFactory is a mock of ProcessorFactory interface.
diff --git a/service/history/wrappers/ratelimited/handler_generated.go b/service/history/wrappers/ratelimited/handler_generated.go
index 4209ced071c..3a2ab3669e3 100644
--- a/service/history/wrappers/ratelimited/handler_generated.go
+++ b/service/history/wrappers/ratelimited/handler_generated.go
@@ -1,9 +1,31 @@
+// The MIT License (MIT)
+
+// Copyright (c) 2017-2020 Uber Technologies Inc.
+
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+package ratelimited
+
 // Code generated by gowrap. DO NOT EDIT.
 // template: ../../templates/ratelimited.tmpl
 // gowrap: http://github.com/hexdigest/gowrap
 
-package ratelimited
-
 //go:generate gowrap gen -p github.com/uber/cadence/service/history/handler -i Handler -t ../../templates/ratelimited.tmpl -o handler_generated.go -v handler=History -l ""
 
 import (
@@ -14,13 +36,13 @@ import (
 	"github.com/uber/cadence/common/log"
 	"github.com/uber/cadence/common/types"
 	"github.com/uber/cadence/service/frontend/validate"
-	_sourceHandler "github.com/uber/cadence/service/history/handler"
+	"github.com/uber/cadence/service/history/handler"
 	"github.com/uber/cadence/service/history/workflowcache"
 )
 
-// historyHandler implements _sourceHandler.Handler interface instrumented with rate limiter.
+// historyHandler implements handler.Handler interface instrumented with rate limiter.
 type historyHandler struct {
-	wrapped         _sourceHandler.Handler
+	wrapped         handler.Handler
 	workflowIDCache workflowcache.WFCache
 	logger          log.Logger
 	allowFunc       func(domainID string, workflowID string) bool
@@ -28,10 +50,10 @@ type historyHandler struct {
 
 // NewHistoryHandler creates a new instance of Handler with ratelimiter.
 func NewHistoryHandler(
-	wrapped _sourceHandler.Handler,
+	wrapped handler.Handler,
 	workflowIDCache workflowcache.WFCache,
 	logger log.Logger,
-) _sourceHandler.Handler {
+) handler.Handler {
 	wrapper := &historyHandler{
 		wrapped:         wrapped,
 		workflowIDCache: workflowIDCache,