diff --git a/ffmpeg_linux_test.go b/ffmpeg_linux_test.go
index f9fc62e..26b3ba9 100644
--- a/ffmpeg_linux_test.go
+++ b/ffmpeg_linux_test.go
@@ -1,6 +1,8 @@
 package ffmpeg_go
 
 import (
+	"os/exec"
+	"syscall"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
diff --git a/run_linux.go b/run_linux.go
index 641a167..8bd2f01 100644
--- a/run_linux.go
+++ b/run_linux.go
@@ -5,8 +5,10 @@ import (
 	"errors"
 	"io/ioutil"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"strconv"
+	"syscall"
 
 	"github.com/u2takey/go-utils/rand"
 )