diff --git a/cmd/bundler.go b/cmd/bundler.go
index 0049d64..4ea67df 100644
--- a/cmd/bundler.go
+++ b/cmd/bundler.go
@@ -6,6 +6,7 @@ import (
 	parser_io "github.com/aquasecurity/go-dep-parser/pkg/io"
 	"github.com/aquasecurity/go-dep-parser/pkg/ruby/bundler"
 	"github.com/kyoshidajp/dep-doctor/cmd/github"
+	"golang.org/x/exp/slices"
 )
 
 type BundlerDoctor struct {
@@ -15,7 +16,7 @@ func NewBundlerDoctor() *BundlerDoctor {
 	return &BundlerDoctor{}
 }
 
-func (b *BundlerDoctor) Diagnose(r parser_io.ReadSeekerAt, year int) map[string]Diagnosis {
+func (b *BundlerDoctor) Diagnose(r parser_io.ReadSeekerAt, year int, ignores []string) map[string]Diagnosis {
 	diagnoses := make(map[string]Diagnosis)
 	slicedNameWithOwners := [][]github.NameWithOwner{}
 	nameWithOwners := b.NameWithOwners(r)
@@ -32,10 +33,12 @@ func (b *BundlerDoctor) Diagnose(r parser_io.ReadSeekerAt, year int) map[string]
 	for _, nameWithOwners := range slicedNameWithOwners {
 		repos := github.FetchFromGitHub(nameWithOwners)
 		for _, r := range repos {
+			isIgnore := slices.Contains(ignores, r.Name)
 			diagnosis := Diagnosis{
 				Name:      r.Name,
 				Url:       r.Url,
 				Archived:  r.Archived,
+				Ignored:   isIgnore,
 				Diagnosed: true,
 				IsActive:  r.IsActive(year),
 			}
diff --git a/cmd/diagnose.go b/cmd/diagnose.go
index 683f807..d9c19d9 100644
--- a/cmd/diagnose.go
+++ b/cmd/diagnose.go
@@ -18,7 +18,7 @@ import (
 const MAX_YEAR_TO_BE_BLANK = 5
 
 type Doctor interface {
-	Diagnose(r io.ReadSeekerAt, year int) map[string]Diagnosis
+	Diagnose(r io.ReadSeekerAt, year int, ignores []string) map[string]Diagnosis
 	NameWithOwners(r parser_io.ReadSeekerAt) []github.NameWithOwner
 }
 
@@ -26,6 +26,7 @@ type Diagnosis struct {
 	Name      string
 	Url       string
 	Archived  bool
+	Ignored   bool
 	Diagnosed bool
 	IsActive  bool
 }
@@ -40,13 +41,18 @@ func NewDepartment(d Doctor) *Department {
 	}
 }
 
-func (d *Department) Diagnose(r io.ReadSeekCloserAt, year int) map[string]Diagnosis {
-	return d.doctor.Diagnose(r, year)
+func (d *Department) Diagnose(r io.ReadSeekCloserAt, year int, ignores []string) map[string]Diagnosis {
+	return d.doctor.Diagnose(r, year, ignores)
 }
 
 type Options struct {
 	packageManager string
 	lockFilePath   string
+	ignores        string
+}
+
+func (o *Options) Ignores() []string {
+	return strings.Split(o.ignores, " ")
 }
 
 var (
@@ -85,7 +91,7 @@ var diagnoseCmd = &cobra.Command{
 		}
 
 		department := NewDepartment(doctor)
-		diagnoses := department.Diagnose(f, MAX_YEAR_TO_BE_BLANK)
+		diagnoses := department.Diagnose(f, MAX_YEAR_TO_BE_BLANK, o.Ignores())
 		if err := Report(diagnoses); err != nil {
 			os.Exit(1)
 		}
@@ -96,14 +102,23 @@ func init() {
 	rootCmd.AddCommand(diagnoseCmd)
 	diagnoseCmd.Flags().StringVarP(&o.packageManager, "package", "p", "bundler", "package manager")
 	diagnoseCmd.Flags().StringVarP(&o.lockFilePath, "lock_file", "f", "Gemfile.lock", "lock file path")
+	diagnoseCmd.Flags().StringVarP(&o.ignores, "ignores", "i", "", "ignore dependencies")
 }
 
 func Report(diagnoses map[string]Diagnosis) error {
 	errMessages := []string{}
 	warnMessages := []string{}
+	ignoredMessages := []string{}
 	errCount := 0
 	unDiagnosedCount := 0
+	ignoredCount := 0
 	for _, diagnosis := range diagnoses {
+		if diagnosis.Ignored {
+			ignoredMessages = append(ignoredMessages, fmt.Sprintf("[info] %s (ignored):", diagnosis.Name))
+			ignoredCount += 1
+			continue
+		}
+
 		if !diagnosis.Diagnosed {
 			warnMessages = append(warnMessages, fmt.Sprintf("[warn] %s (unknown):", diagnosis.Name))
 			unDiagnosedCount += 1
@@ -120,6 +135,9 @@ func Report(diagnoses map[string]Diagnosis) error {
 	}
 
 	fmt.Printf("\n")
+	if len(ignoredMessages) > 0 {
+		fmt.Println(strings.Join(ignoredMessages, "\n"))
+	}
 	if len(warnMessages) > 0 {
 		color.Yellow(strings.Join(warnMessages, "\n"))
 	}
@@ -129,10 +147,11 @@ func Report(diagnoses map[string]Diagnosis) error {
 
 	color.Green(heredoc.Docf(`
 		Diagnose complete! %d dependencies.
-		%d error, %d unknown`,
+		%d error, %d unknown, %d ignored`,
 		len(diagnoses),
 		errCount,
-		unDiagnosedCount),
+		unDiagnosedCount,
+		ignoredCount),
 	)
 
 	if len(errMessages) > 0 {
diff --git a/cmd/diagnose_test.go b/cmd/diagnose_test.go
index 7c72e65..8e907a1 100644
--- a/cmd/diagnose_test.go
+++ b/cmd/diagnose_test.go
@@ -14,6 +14,7 @@ func TestDiagnose(t *testing.T) {
 			Name:      "faker",
 			Url:       "https://github.com/faker-ruby/faker",
 			Archived:  false,
+			Ignored:   false,
 			Diagnosed: true,
 			IsActive:  true,
 		},
@@ -21,6 +22,7 @@ func TestDiagnose(t *testing.T) {
 			Name:      "concurrent-ruby",
 			Url:       "https://github.com/ruby-concurrency/concurrent-ruby",
 			Archived:  false,
+			Ignored:   false,
 			Diagnosed: true,
 			IsActive:  true,
 		},
@@ -28,6 +30,7 @@ func TestDiagnose(t *testing.T) {
 			Name:      "i18n",
 			Url:       "https://github.com/ruby-i18n/i18n",
 			Archived:  false,
+			Ignored:   true,
 			Diagnosed: true,
 			IsActive:  true,
 		},
@@ -35,6 +38,7 @@ func TestDiagnose(t *testing.T) {
 			Name:      "method_source",
 			Url:       "https://github.com/banister/method_source",
 			Archived:  false,
+			Ignored:   false,
 			Diagnosed: true,
 			IsActive:  true,
 		},
@@ -42,6 +46,7 @@ func TestDiagnose(t *testing.T) {
 			Name:      "paperclip",
 			Url:       "https://github.com/thoughtbot/paperclip",
 			Archived:  true,
+			Ignored:   false,
 			Diagnosed: true,
 			IsActive:  false,
 		},
@@ -49,6 +54,7 @@ func TestDiagnose(t *testing.T) {
 			Name:      "dotenv",
 			Url:       "https://github.com/bkeepers/dotenv",
 			Archived:  false,
+			Ignored:   false,
 			Diagnosed: true,
 			IsActive:  true,
 		},
@@ -60,7 +66,8 @@ func TestDiagnose(t *testing.T) {
 		defer f.Close()
 
 		doctor := NewDepartment(NewBundlerDoctor())
-		diagnoses := doctor.Diagnose(f, 2)
+		ignores := []string{"i18n"}
+		diagnoses := doctor.Diagnose(f, 2, ignores)
 		assert.Equal(t, expect, diagnoses)
 	})
 }
diff --git a/cmd/npm.go b/cmd/npm.go
index 5a6f384..3316f42 100644
--- a/cmd/npm.go
+++ b/cmd/npm.go
@@ -15,7 +15,7 @@ func NewNPMDoctor() *NPMDoctor {
 	return &NPMDoctor{}
 }
 
-func (d *NPMDoctor) Diagnose(r parser_io.ReadSeekerAt, year int) map[string]Diagnosis {
+func (d *NPMDoctor) Diagnose(r parser_io.ReadSeekerAt, year int, ignores []string) map[string]Diagnosis {
 	diagnoses := make(map[string]Diagnosis)
 	slicedNameWithOwners := [][]github.NameWithOwner{}
 	nameWithOwners := d.NameWithOwners(r)
diff --git a/cmd/pip.go b/cmd/pip.go
index e80ff96..8124dc0 100644
--- a/cmd/pip.go
+++ b/cmd/pip.go
@@ -15,7 +15,7 @@ func NewPipDoctor() *PipDoctor {
 	return &PipDoctor{}
 }
 
-func (d *PipDoctor) Diagnose(r parser_io.ReadSeekerAt, year int) map[string]Diagnosis {
+func (d *PipDoctor) Diagnose(r parser_io.ReadSeekerAt, year int, ignores []string) map[string]Diagnosis {
 	diagnoses := make(map[string]Diagnosis)
 	slicedNameWithOwners := [][]github.NameWithOwner{}
 	nameWithOwners := d.NameWithOwners(r)
diff --git a/cmd/yarn.go b/cmd/yarn.go
index d2f9caa..a04021a 100644
--- a/cmd/yarn.go
+++ b/cmd/yarn.go
@@ -15,7 +15,7 @@ func NewYarnDoctor() *YarnDoctor {
 	return &YarnDoctor{}
 }
 
-func (d *YarnDoctor) Diagnose(r parser_io.ReadSeekerAt, year int) map[string]Diagnosis {
+func (d *YarnDoctor) Diagnose(r parser_io.ReadSeekerAt, year int, ignores []string) map[string]Diagnosis {
 	diagnoses := make(map[string]Diagnosis)
 	slicedNameWithOwners := [][]github.NameWithOwner{}
 	nameWithOwners := d.NameWithOwners(r)