diff --git a/cmd/list.go b/cmd/list.go
index a20684c..a662d52 100644
--- a/cmd/list.go
+++ b/cmd/list.go
@@ -8,7 +8,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var listCmd = &cobra.Command{
+var listCmd = &cobra.Command{ //nolint
 	Use:   "list",
 	Short: "List up GitHub pull request information",
 	Long: `List up GitHub repository or pull request information.
@@ -28,7 +28,7 @@ func init() { //nolint
 	*/
 }
 
-func list(cmd *cobra.Command, args []string) error {
+func list(cmd *cobra.Command, args []string) error { //nolint
 	leadTime, err := di.NewLeadTime()
 	if err != nil {
 		return err
diff --git a/cmd/root.go b/cmd/root.go
index 0a198bb..bcc51c3 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -16,7 +16,9 @@ func Execute() int {
 	rootCmd.CompletionOptions.DisableDefaultCmd = true
 	if err := rootCmd.Execute(); err != nil {
 		log.Error(err)
+
 		return 1
 	}
+
 	return 0
 }
diff --git a/cmd/stat.go b/cmd/stat.go
index 76f28b4..955ab6d 100644
--- a/cmd/stat.go
+++ b/cmd/stat.go
@@ -9,7 +9,7 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var statCmd = &cobra.Command{
+var statCmd = &cobra.Command{ //nolint
 	Use:   "stat",
 	Short: "Print GitHub pull request leadtime statics",
 	Long:  `Print GitHub pull request leadtime statics`,
@@ -22,7 +22,7 @@ func init() { //nolint
 	rootCmd.AddCommand(statCmd)
 }
 
-func stat(cmd *cobra.Command, args []string) error {
+func stat(cmd *cobra.Command, args []string) error { //nolint
 	leadTime, err := di.NewLeadTime()
 	if err != nil {
 		return err
@@ -64,5 +64,6 @@ func stat(cmd *cobra.Command, args []string) error {
 	fmt.Printf(" Lead Time(Sum)          = %d[min]\n", output.LeadTime.Sum())
 	fmt.Printf(" Lead Time(Ave)          = %.2f[min]\n", output.LeadTime.Ave())
 	fmt.Printf(" Lead Time(Median)       = %.2f[min]\n", output.LeadTime.Median())
+
 	return nil
 }
diff --git a/config/config.go b/config/config.go
index a15d8d0..f3f9b1a 100644
--- a/config/config.go
+++ b/config/config.go
@@ -20,6 +20,7 @@ func NewGitHubConfig() (*GitHubConfig, error) {
 	if err := env.Parse(cfg); err != nil {
 		return nil, ErrNotSetGitHubAccessToken
 	}
+
 	return cfg, nil
 }
 
diff --git a/config/config_test.go b/config/config_test.go
index b822788..051715c 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -9,10 +9,10 @@ import (
 	"github.com/nao1215/leadtime/domain/model"
 )
 
-func TestNewGitHubConfig(t *testing.T) {
+func TestNewGitHubConfig(t *testing.T) { //nolint
 	const token = model.Token("test_token")
 
-	t.Run("Get github config", func(t *testing.T) {
+	t.Run("Get github config", func(t *testing.T) { //nolint
 		t.Setenv("LT_GITHUB_ACCESS_TOKEN", token.String())
 
 		want := &GitHubConfig{
@@ -28,7 +28,7 @@ func TestNewGitHubConfig(t *testing.T) {
 		}
 	})
 
-	t.Run("if user does not set github access token", func(t *testing.T) {
+	t.Run("if user does not set github access token", func(t *testing.T) { //nolint
 		_, got := NewGitHubConfig()
 		if !errors.Is(got, ErrNotSetGitHubAccessToken) {
 			t.Errorf("mismatch want=%v, got=%v", ErrNotSetGitHubAccessToken, got)
diff --git a/domain/usecase/pull_request.go b/domain/usecase/pull_request.go
index 016a3ca..875a539 100644
--- a/domain/usecase/pull_request.go
+++ b/domain/usecase/pull_request.go
@@ -34,7 +34,7 @@ func (pr *PRUsecaseListInput) Valid() error {
 
 // isEmptyRepositoryName check whether repository name is empty.
 // true means empty, false means not empty.
-func (pr *PRUsecaseListInput) isEmptyRepositoryName() bool {
+func (pr *PRUsecaseListInput) isEmptyRepositoryName() bool { //nolist
 	return pr.Repository == ""
 }
 
diff --git a/infrastructure/github/github.go b/infrastructure/github/github.go
index 56154e2..f9cc91c 100644
--- a/infrastructure/github/github.go
+++ b/infrastructure/github/github.go
@@ -77,11 +77,12 @@ func (c *GitHubRepository) ListRepositories(ctx context.Context) ([]*model.Repos
 
 // ListPullRequests return List the pull requests.
 func (c *GitHubRepository) ListPullRequests(ctx context.Context, owner, repo string) ([]*model.PullRequest, error) {
+	const pagingLimit = 20
 
 	pullReqs := make([]*model.PullRequest, 0)
 	opts := &github.PullRequestListOptions{
 		State:       "all",
-		ListOptions: github.ListOptions{PerPage: 20},
+		ListOptions: github.ListOptions{PerPage: pagingLimit},
 	}
 
 	for {
@@ -115,7 +116,9 @@ func (c *GitHubRepository) ListPullRequests(ctx context.Context, owner, repo str
 // ListCommitsInPR return List the commits in the PR.
 // oreder is newest to oldest.
 func (c *GitHubRepository) ListCommitsInPR(ctx context.Context, owner, repo string, number int) ([]*model.Commit, error) {
-	opts := &github.ListOptions{PerPage: 20}
+	const pagingLimit = 20
+
+	opts := &github.ListOptions{PerPage: pagingLimit}
 
 	commitsInPR := make([]*model.Commit, 0)
 	for {
diff --git a/main.go b/main.go
index baaa554..e9e4eba 100644
--- a/main.go
+++ b/main.go
@@ -8,7 +8,7 @@ import (
 )
 
 // osExit is wrapper for  os.Exit(). It's for unit test.
-var osExit = os.Exit
+var osExit = os.Exit //nolint
 
 func main() {
 	osExit(cmd.Execute())