diff --git a/internal/internal_worker.go b/internal/internal_worker.go
index 06c8ed0b7..ff94b1943 100644
--- a/internal/internal_worker.go
+++ b/internal/internal_worker.go
@@ -29,7 +29,6 @@ import (
 	"encoding/hex"
 	"errors"
 	"fmt"
-	"go.uber.org/cadence/internal/common/debug"
 	"io"
 	"os"
 	"reflect"
@@ -40,6 +39,8 @@ import (
 	"sync/atomic"
 	"time"
 
+	"go.uber.org/cadence/internal/common/debug"
+
 	"go.uber.org/cadence/internal/common/isolationgroup"
 
 	"github.com/opentracing/opentracing-go"
diff --git a/internal/internal_worker_base.go b/internal/internal_worker_base.go
index 5ddfff6fe..d0fb9a310 100644
--- a/internal/internal_worker_base.go
+++ b/internal/internal_worker_base.go
@@ -27,13 +27,14 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"go.uber.org/cadence/internal/common/debug"
 	"os"
 	"runtime"
 	"sync"
 	"syscall"
 	"time"
 
+	"go.uber.org/cadence/internal/common/debug"
+
 	"github.com/shirou/gopsutil/cpu"
 	"github.com/uber-go/tally"
 	"go.uber.org/zap"
diff --git a/internal/internal_worker_test.go b/internal/internal_worker_test.go
index 596505a4f..068f95f88 100644
--- a/internal/internal_worker_test.go
+++ b/internal/internal_worker_test.go
@@ -24,7 +24,6 @@ package internal
 import (
 	"context"
 	"errors"
-	"go.uber.org/cadence/internal/common/debug"
 	"os"
 	"reflect"
 	"runtime"
@@ -32,6 +31,8 @@ import (
 	"testing"
 	"time"
 
+	"go.uber.org/cadence/internal/common/debug"
+
 	"github.com/golang/mock/gomock"
 	"github.com/opentracing/opentracing-go"
 	"github.com/stretchr/testify/assert"
diff --git a/internal/worker.go b/internal/worker.go
index decd9f56d..448cf95ef 100644
--- a/internal/worker.go
+++ b/internal/worker.go
@@ -23,9 +23,10 @@ package internal
 
 import (
 	"context"
-	"go.uber.org/cadence/internal/common/debug"
 	"time"
 
+	"go.uber.org/cadence/internal/common/debug"
+
 	"github.com/opentracing/opentracing-go"
 	"github.com/uber-go/tally"
 	"go.uber.org/zap"