diff --git a/ecrm.go b/ecrm.go
index 4d67e5d..b599865 100644
--- a/ecrm.go
+++ b/ecrm.go
@@ -9,7 +9,6 @@ import (
 
 	"github.com/Songmu/prompter"
 	"github.com/aws/aws-sdk-go-v2/aws"
-	"github.com/aws/aws-sdk-go-v2/aws/arn"
 	awsConfig "github.com/aws/aws-sdk-go-v2/config"
 	"github.com/aws/aws-sdk-go-v2/service/ecr"
 	ecrTypes "github.com/aws/aws-sdk-go-v2/service/ecr/types"
@@ -157,15 +156,3 @@ func imageTag(d ecrTypes.ImageDetail) (string, bool) {
 		return untaggedStr, false
 	}
 }
-
-func arnToName(name, removePrefix string) string {
-	if arn.IsARN(name) {
-		a, _ := arn.Parse(name)
-		return strings.Replace(a.Resource, removePrefix, "", 1)
-	}
-	return name
-}
-
-func clusterArnToName(arn string) string {
-	return arnToName(arn, "cluster/")
-}
diff --git a/generate.go b/generate.go
index 0f8b043..e7053bc 100644
--- a/generate.go
+++ b/generate.go
@@ -14,7 +14,6 @@ import (
 	"github.com/Songmu/prompter"
 	"github.com/aws/aws-sdk-go-v2/aws"
 	"github.com/aws/aws-sdk-go-v2/service/ecr"
-	ecrTypes "github.com/aws/aws-sdk-go-v2/service/ecr/types"
 	"github.com/aws/aws-sdk-go-v2/service/ecs"
 	"github.com/aws/aws-sdk-go-v2/service/lambda"
 	"github.com/goccy/go-yaml"
@@ -170,7 +169,7 @@ func (g *Generator) generateLambdaConfig(ctx context.Context, config *Config) er
 }
 
 func (g *Generator) generateRepositoryConfig(ctx context.Context, config *Config) error {
-	repos, err := g.repositories(ctx)
+	repos, err := ecrRepositories(ctx, ecr.NewFromConfig(g.awsCfg))
 	if err != nil {
 		return err
 	}
@@ -202,16 +201,3 @@ func (g *Generator) generateRepositoryConfig(ctx context.Context, config *Config
 	})
 	return nil
 }
-
-func (g *Generator) repositories(ctx context.Context) ([]ecrTypes.Repository, error) {
-	repos := make([]ecrTypes.Repository, 0)
-	p := ecr.NewDescribeRepositoriesPaginator(ecr.NewFromConfig(g.awsCfg), &ecr.DescribeRepositoriesInput{})
-	for p.HasMorePages() {
-		repo, err := p.NextPage(ctx)
-		if err != nil {
-			return nil, err
-		}
-		repos = append(repos, repo.Repositories...)
-	}
-	return repos, nil
-}
diff --git a/util.go b/util.go
index 5593440..8f841c3 100644
--- a/util.go
+++ b/util.go
@@ -4,7 +4,11 @@ import (
 	"context"
 	"log"
 
+	"strings"
+
 	"github.com/aws/aws-sdk-go-v2/aws"
+	"github.com/aws/aws-sdk-go-v2/aws/arn"
+	"github.com/aws/aws-sdk-go-v2/service/ecr"
 	ecrTypes "github.com/aws/aws-sdk-go-v2/service/ecr/types"
 	"github.com/aws/aws-sdk-go-v2/service/ecs"
 	"github.com/aws/aws-sdk-go-v2/service/lambda"
@@ -79,3 +83,28 @@ func lambdaFunctions(ctx context.Context, client *lambda.Client) ([]lambdaTypes.
 	}
 	return fns, nil
 }
+
+func ecrRepositories(ctx context.Context, client *ecr.Client) ([]ecrTypes.Repository, error) {
+	repos := make([]ecrTypes.Repository, 0)
+	p := ecr.NewDescribeRepositoriesPaginator(client, &ecr.DescribeRepositoriesInput{})
+	for p.HasMorePages() {
+		repo, err := p.NextPage(ctx)
+		if err != nil {
+			return nil, err
+		}
+		repos = append(repos, repo.Repositories...)
+	}
+	return repos, nil
+}
+
+func arnToName(name, removePrefix string) string {
+	if arn.IsARN(name) {
+		a, _ := arn.Parse(name)
+		return strings.Replace(a.Resource, removePrefix, "", 1)
+	}
+	return name
+}
+
+func clusterArnToName(arn string) string {
+	return arnToName(arn, "cluster/")
+}