diff --git a/command_test.go b/command_test.go
index 7c1141d..41b353f 100644
--- a/command_test.go
+++ b/command_test.go
@@ -3,6 +3,7 @@ package main
 import (
 	"io/ioutil"
 	"os"
+	"path/filepath"
 	"strings"
 	"testing"
 
@@ -18,7 +19,7 @@ func setupTestCase(t *testing.T) {
 	t.Log("Setup testcase")
 
 	homeDir = manager.GetHomeDir()
-	memoFile = homeDir + "/.gomo-tmp/memo.json"
+	memoFile = filepath.Join(homeDir, ".gomo-tmp", "memo.json")
 
 	os.Remove(memoFile)
 }
@@ -27,7 +28,7 @@ func teardownTestCase(t *testing.T) {
 	t.Log("Teardown testcase")
 
 	homeDir = manager.GetHomeDir()
-	memoFile = homeDir + "/.gomo-tmp/memo.json"
+	memoFile = filepath.Join(homeDir, ".gomo-tmp", "memo.json")
 
 	os.Remove(memoFile)
 }
diff --git a/manager/manager.go b/manager/manager.go
index 35e38f0..3eeafbb 100644
--- a/manager/manager.go
+++ b/manager/manager.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"fmt"
 	"os"
+	"path/filepath"
 	"runtime"
 )
 
@@ -26,7 +27,7 @@ func New() *Manager {
 	homeDir := GetHomeDir()
 
 	return &Manager{
-		file:     homeDir + "/.gomo/memo.json",
+		file:     filepath.Join(homeDir, ".gomo", "memo.json"),
 		commands: make(map[string]Command),
 	}
 }