diff --git a/internal/fileutil/fileutil.go b/internal/fileutil/fileutil.go
index 8a889f495..b737877cf 100644
--- a/internal/fileutil/fileutil.go
+++ b/internal/fileutil/fileutil.go
@@ -71,7 +71,13 @@ func CompressDirToTgz(chartTmpDir, tmpdir string) (*bytes.Buffer, error) {
 	// tar => gzip => buf
 	buf := bytes.NewBuffer(nil)
 	zr := gzip.NewWriter(buf)
+
 	zr.ModTime = time.Date(1977, time.May, 25, 0, 0, 0, 0, time.UTC)
+	zr.Header.ModTime = time.Date(1977, time.May, 25, 0, 0, 0, 0, time.UTC)
+	zr.Header.OS = 3 // Unix
+	zr.OS = 3        //Unix
+	zr.Extra = nil
+
 	tw := tar.NewWriter(zr)
 
 	// walk through every file in the folder
@@ -93,7 +99,18 @@ func CompressDirToTgz(chartTmpDir, tmpdir string) (*bytes.Buffer, error) {
 		header.ModTime = time.Date(1977, time.May, 25, 0, 0, 0, 0, time.UTC)
 		header.AccessTime = time.Date(1977, time.May, 25, 0, 0, 0, 0, time.UTC)
 		header.ChangeTime = time.Date(1977, time.May, 25, 0, 0, 0, 0, time.UTC)
-		header.Format = tar.FormatGNU
+		header.Format = tar.FormatPAX
+		header.PAXRecords = nil
+
+		if fi.IsDir() {
+			header.Typeflag = tar.TypeDir
+			header.Mode |= 0755
+			header.Size = 0
+		} else {
+			header.Typeflag = tar.TypeReg
+			header.Mode |= 0644
+			header.Size = fi.Size()
+		}
 
 		// write header
 		if err := tw.WriteHeader(header); err != nil {
diff --git a/internal/fileutil/fileutil_test.go b/internal/fileutil/fileutil_test.go
index ac10dbac6..01d50c188 100644
--- a/internal/fileutil/fileutil_test.go
+++ b/internal/fileutil/fileutil_test.go
@@ -17,9 +17,10 @@ limitations under the License.
 package fileutil
 
 import (
+	"archive/tar"
 	"bytes"
-	"crypto/md5"
-	"encoding/hex"
+	"compress/gzip"
+	"io"
 	"io/ioutil"
 	"os"
 	"path/filepath"
@@ -62,21 +63,43 @@ func TestAtomicWriteFile(t *testing.T) {
 func TestCompressDirToTgz(t *testing.T) {
 
 	testDataDir := "testdata"
-	chartTestDir := "testdata/helmchart"
-	expectMd5Value := "218a88e89fa53efc6dd56aab27159880"
-	expectChartBytesLen := 3998
+	chartTestDir := "testdata/testdir"
 
 	chartBytes, err := CompressDirToTgz(chartTestDir, testDataDir)
 	if err != nil {
 		t.Fatal(err)
 	}
-	chartBytesLen := chartBytes.Len()
-	hash := md5.Sum(chartBytes.Bytes())
-	currentMd5Value := hex.EncodeToString(hash[:])
-	if currentMd5Value != expectMd5Value {
-		t.Fatalf("Expect md5 %s, but get md5 %s, len %d", expectMd5Value, currentMd5Value, chartBytesLen)
+
+	// gzip read
+	gr, err := gzip.NewReader(chartBytes)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer gr.Close()
+
+	// tar read
+	tr := tar.NewReader(gr)
+	defer gr.Close()
+
+	found := false
+	fileBytes := bytes.NewBuffer(nil)
+	for {
+		hdr, err := tr.Next()
+		if err == io.EOF {
+			break
+		}
+		if hdr.Name == "testdir/testfile" {
+			found = true
+			_, err := io.Copy(fileBytes, tr)
+			if err != nil {
+				t.Fatal(err)
+			}
+		}
+	}
+	if !found {
+		t.Fatal("testdir/testfile not found")
 	}
-	if chartBytesLen != expectChartBytesLen {
-		t.Fatalf("Expect chartBytesLen %d, but get %d", expectChartBytesLen, chartBytesLen)
+	if !bytes.Equal(fileBytes.Bytes(), []byte("helm")) {
+		t.Fatalf("testdir/testfile's content not match, excpcted %s, got %s", "helm", fileBytes.String())
 	}
 }
diff --git a/internal/fileutil/testdata/helmchart/.helmignore b/internal/fileutil/testdata/helmchart/.helmignore
deleted file mode 100644
index 0e8a0eb36..000000000
--- a/internal/fileutil/testdata/helmchart/.helmignore
+++ /dev/null
@@ -1,23 +0,0 @@
-# Patterns to ignore when building packages.
-# This supports shell glob matching, relative path matching, and
-# negation (prefixed with !). Only one pattern per line.
-.DS_Store
-# Common VCS dirs
-.git/
-.gitignore
-.bzr/
-.bzrignore
-.hg/
-.hgignore
-.svn/
-# Common backup files
-*.swp
-*.bak
-*.tmp
-*.orig
-*~
-# Various IDEs
-.project
-.idea/
-*.tmproj
-.vscode/
diff --git a/internal/fileutil/testdata/helmchart/Chart.yaml b/internal/fileutil/testdata/helmchart/Chart.yaml
deleted file mode 100644
index c4239c942..000000000
--- a/internal/fileutil/testdata/helmchart/Chart.yaml
+++ /dev/null
@@ -1,24 +0,0 @@
-apiVersion: v2
-name: helmchart
-description: A Helm chart for Kubernetes
-
-# A chart can be either an 'application' or a 'library' chart.
-#
-# Application charts are a collection of templates that can be packaged into versioned archives
-# to be deployed.
-#
-# Library charts provide useful utilities or functions for the chart developer. They're included as
-# a dependency of application charts to inject those utilities and functions into the rendering
-# pipeline. Library charts do not define any templates and therefore cannot be deployed.
-type: application
-
-# This is the chart version. This version number should be incremented each time you make changes
-# to the chart and its templates, including the app version.
-# Versions are expected to follow Semantic Versioning (https://semver.org/)
-version: 0.1.0
-
-# This is the version number of the application being deployed. This version number should be
-# incremented each time you make changes to the application. Versions are not expected to
-# follow Semantic Versioning. They should reflect the version the application is using.
-# It is recommended to use it with quotes.
-appVersion: "1.16.0"
diff --git a/internal/fileutil/testdata/helmchart/templates/NOTES.txt b/internal/fileutil/testdata/helmchart/templates/NOTES.txt
deleted file mode 100644
index 41d5cffaf..000000000
--- a/internal/fileutil/testdata/helmchart/templates/NOTES.txt
+++ /dev/null
@@ -1,22 +0,0 @@
-1. Get the application URL by running these commands:
-{{- if .Values.ingress.enabled }}
-{{- range $host := .Values.ingress.hosts }}
-  {{- range .paths }}
-  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ .path }}
-  {{- end }}
-{{- end }}
-{{- else if contains "NodePort" .Values.service.type }}
-  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "helmchart.fullname" . }})
-  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
-  echo http://$NODE_IP:$NODE_PORT
-{{- else if contains "LoadBalancer" .Values.service.type }}
-     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
-           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "helmchart.fullname" . }}'
-  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "helmchart.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
-  echo http://$SERVICE_IP:{{ .Values.service.port }}
-{{- else if contains "ClusterIP" .Values.service.type }}
-  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "helmchart.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
-  export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
-  echo "Visit http://127.0.0.1:8080 to use your application"
-  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
-{{- end }}
diff --git a/internal/fileutil/testdata/helmchart/templates/_helpers.tpl b/internal/fileutil/testdata/helmchart/templates/_helpers.tpl
deleted file mode 100644
index 28bcb84bd..000000000
--- a/internal/fileutil/testdata/helmchart/templates/_helpers.tpl
+++ /dev/null
@@ -1,62 +0,0 @@
-{{/*
-Expand the name of the chart.
-*/}}
-{{- define "helmchart.name" -}}
-{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
-{{- end }}
-
-{{/*
-Create a default fully qualified app name.
-We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
-If release name contains chart name it will be used as a full name.
-*/}}
-{{- define "helmchart.fullname" -}}
-{{- if .Values.fullnameOverride }}
-{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
-{{- else }}
-{{- $name := default .Chart.Name .Values.nameOverride }}
-{{- if contains $name .Release.Name }}
-{{- .Release.Name | trunc 63 | trimSuffix "-" }}
-{{- else }}
-{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
-{{- end }}
-{{- end }}
-{{- end }}
-
-{{/*
-Create chart name and version as used by the chart label.
-*/}}
-{{- define "helmchart.chart" -}}
-{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
-{{- end }}
-
-{{/*
-Common labels
-*/}}
-{{- define "helmchart.labels" -}}
-helm.sh/chart: {{ include "helmchart.chart" . }}
-{{ include "helmchart.selectorLabels" . }}
-{{- if .Chart.AppVersion }}
-app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
-{{- end }}
-app.kubernetes.io/managed-by: {{ .Release.Service }}
-{{- end }}
-
-{{/*
-Selector labels
-*/}}
-{{- define "helmchart.selectorLabels" -}}
-app.kubernetes.io/name: {{ include "helmchart.name" . }}
-app.kubernetes.io/instance: {{ .Release.Name }}
-{{- end }}
-
-{{/*
-Create the name of the service account to use
-*/}}
-{{- define "helmchart.serviceAccountName" -}}
-{{- if .Values.serviceAccount.create }}
-{{- default (include "helmchart.fullname" .) .Values.serviceAccount.name }}
-{{- else }}
-{{- default "default" .Values.serviceAccount.name }}
-{{- end }}
-{{- end }}
diff --git a/internal/fileutil/testdata/helmchart/templates/deployment.yaml b/internal/fileutil/testdata/helmchart/templates/deployment.yaml
deleted file mode 100644
index 0c260cc9b..000000000
--- a/internal/fileutil/testdata/helmchart/templates/deployment.yaml
+++ /dev/null
@@ -1,61 +0,0 @@
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: {{ include "helmchart.fullname" . }}
-  labels:
-    {{- include "helmchart.labels" . | nindent 4 }}
-spec:
-  {{- if not .Values.autoscaling.enabled }}
-  replicas: {{ .Values.replicaCount }}
-  {{- end }}
-  selector:
-    matchLabels:
-      {{- include "helmchart.selectorLabels" . | nindent 6 }}
-  template:
-    metadata:
-      {{- with .Values.podAnnotations }}
-      annotations:
-        {{- toYaml . | nindent 8 }}
-      {{- end }}
-      labels:
-        {{- include "helmchart.selectorLabels" . | nindent 8 }}
-    spec:
-      {{- with .Values.imagePullSecrets }}
-      imagePullSecrets:
-        {{- toYaml . | nindent 8 }}
-      {{- end }}
-      serviceAccountName: {{ include "helmchart.serviceAccountName" . }}
-      securityContext:
-        {{- toYaml .Values.podSecurityContext | nindent 8 }}
-      containers:
-        - name: {{ .Chart.Name }}
-          securityContext:
-            {{- toYaml .Values.securityContext | nindent 12 }}
-          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
-          imagePullPolicy: {{ .Values.image.pullPolicy }}
-          ports:
-            - name: http
-              containerPort: 80
-              protocol: TCP
-          livenessProbe:
-            httpGet:
-              path: /
-              port: http
-          readinessProbe:
-            httpGet:
-              path: /
-              port: http
-          resources:
-            {{- toYaml .Values.resources | nindent 12 }}
-      {{- with .Values.nodeSelector }}
-      nodeSelector:
-        {{- toYaml . | nindent 8 }}
-      {{- end }}
-      {{- with .Values.affinity }}
-      affinity:
-        {{- toYaml . | nindent 8 }}
-      {{- end }}
-      {{- with .Values.tolerations }}
-      tolerations:
-        {{- toYaml . | nindent 8 }}
-      {{- end }}
diff --git a/internal/fileutil/testdata/helmchart/templates/hpa.yaml b/internal/fileutil/testdata/helmchart/templates/hpa.yaml
deleted file mode 100644
index acd8e4207..000000000
--- a/internal/fileutil/testdata/helmchart/templates/hpa.yaml
+++ /dev/null
@@ -1,28 +0,0 @@
-{{- if .Values.autoscaling.enabled }}
-apiVersion: autoscaling/v2beta1
-kind: HorizontalPodAutoscaler
-metadata:
-  name: {{ include "helmchart.fullname" . }}
-  labels:
-    {{- include "helmchart.labels" . | nindent 4 }}
-spec:
-  scaleTargetRef:
-    apiVersion: apps/v1
-    kind: Deployment
-    name: {{ include "helmchart.fullname" . }}
-  minReplicas: {{ .Values.autoscaling.minReplicas }}
-  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
-  metrics:
-    {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
-    - type: Resource
-      resource:
-        name: cpu
-        targetAverageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
-    {{- end }}
-    {{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
-    - type: Resource
-      resource:
-        name: memory
-        targetAverageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
-    {{- end }}
-{{- end }}
diff --git a/internal/fileutil/testdata/helmchart/templates/ingress.yaml b/internal/fileutil/testdata/helmchart/templates/ingress.yaml
deleted file mode 100644
index e9440ab38..000000000
--- a/internal/fileutil/testdata/helmchart/templates/ingress.yaml
+++ /dev/null
@@ -1,41 +0,0 @@
-{{- if .Values.ingress.enabled -}}
-{{- $fullName := include "helmchart.fullname" . -}}
-{{- $svcPort := .Values.service.port -}}
-{{- if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
-apiVersion: networking.k8s.io/v1beta1
-{{- else -}}
-apiVersion: extensions/v1beta1
-{{- end }}
-kind: Ingress
-metadata:
-  name: {{ $fullName }}
-  labels:
-    {{- include "helmchart.labels" . | nindent 4 }}
-  {{- with .Values.ingress.annotations }}
-  annotations:
-    {{- toYaml . | nindent 4 }}
-  {{- end }}
-spec:
-  {{- if .Values.ingress.tls }}
-  tls:
-    {{- range .Values.ingress.tls }}
-    - hosts:
-        {{- range .hosts }}
-        - {{ . | quote }}
-        {{- end }}
-      secretName: {{ .secretName }}
-    {{- end }}
-  {{- end }}
-  rules:
-    {{- range .Values.ingress.hosts }}
-    - host: {{ .host | quote }}
-      http:
-        paths:
-          {{- range .paths }}
-          - path: {{ .path }}
-            backend:
-              serviceName: {{ $fullName }}
-              servicePort: {{ $svcPort }}
-          {{- end }}
-    {{- end }}
-  {{- end }}
diff --git a/internal/fileutil/testdata/helmchart/templates/service.yaml b/internal/fileutil/testdata/helmchart/templates/service.yaml
deleted file mode 100644
index 12e16ef71..000000000
--- a/internal/fileutil/testdata/helmchart/templates/service.yaml
+++ /dev/null
@@ -1,15 +0,0 @@
-apiVersion: v1
-kind: Service
-metadata:
-  name: {{ include "helmchart.fullname" . }}
-  labels:
-    {{- include "helmchart.labels" . | nindent 4 }}
-spec:
-  type: {{ .Values.service.type }}
-  ports:
-    - port: {{ .Values.service.port }}
-      targetPort: http
-      protocol: TCP
-      name: http
-  selector:
-    {{- include "helmchart.selectorLabels" . | nindent 4 }}
diff --git a/internal/fileutil/testdata/helmchart/templates/serviceaccount.yaml b/internal/fileutil/testdata/helmchart/templates/serviceaccount.yaml
deleted file mode 100644
index 0ff995909..000000000
--- a/internal/fileutil/testdata/helmchart/templates/serviceaccount.yaml
+++ /dev/null
@@ -1,12 +0,0 @@
-{{- if .Values.serviceAccount.create -}}
-apiVersion: v1
-kind: ServiceAccount
-metadata:
-  name: {{ include "helmchart.serviceAccountName" . }}
-  labels:
-    {{- include "helmchart.labels" . | nindent 4 }}
-  {{- with .Values.serviceAccount.annotations }}
-  annotations:
-    {{- toYaml . | nindent 4 }}
-  {{- end }}
-{{- end }}
diff --git a/internal/fileutil/testdata/helmchart/templates/tests/test-connection.yaml b/internal/fileutil/testdata/helmchart/templates/tests/test-connection.yaml
deleted file mode 100644
index 5e64cd3ac..000000000
--- a/internal/fileutil/testdata/helmchart/templates/tests/test-connection.yaml
+++ /dev/null
@@ -1,15 +0,0 @@
-apiVersion: v1
-kind: Pod
-metadata:
-  name: "{{ include "helmchart.fullname" . }}-test-connection"
-  labels:
-    {{- include "helmchart.labels" . | nindent 4 }}
-  annotations:
-    "helm.sh/hook": test
-spec:
-  containers:
-    - name: wget
-      image: busybox
-      command: ['wget']
-      args: ['{{ include "helmchart.fullname" . }}:{{ .Values.service.port }}']
-  restartPolicy: Never
diff --git a/internal/fileutil/testdata/helmchart/values.yaml b/internal/fileutil/testdata/helmchart/values.yaml
deleted file mode 100644
index 211528bf7..000000000
--- a/internal/fileutil/testdata/helmchart/values.yaml
+++ /dev/null
@@ -1,83 +0,0 @@
-# Default values for helmchart.
-# This is a YAML-formatted file.
-# Declare variables to be passed into your templates.
-
-replicaCount: 1
-
-image:
-  repository: nginx
-  pullPolicy: IfNotPresent
-  # Overrides the image tag whose default is the chart appVersion.
-  tag: ""
-
-imagePullSecrets: []
-nameOverride: ""
-fullnameOverride: ""
-
-serviceAccount:
-  # Specifies whether a service account should be created
-  create: true
-  # Annotations to add to the service account
-  annotations: {}
-  # The name of the service account to use.
-  # If not set and create is true, a name is generated using the fullname template
-  name: ""
-
-podAnnotations: {}
-
-podSecurityContext: {}
-  # fsGroup: 2000
-
-securityContext: {}
-  # capabilities:
-  #   drop:
-  #   - ALL
-  # readOnlyRootFilesystem: true
-  # runAsNonRoot: true
-  # runAsUser: 1000
-
-service:
-  type: ClusterIP
-  port: 80
-
-ingress:
-  enabled: false
-  annotations: {}
-    # kubernetes.io/ingress.class: nginx
-    # kubernetes.io/tls-acme: "true"
-  hosts:
-    - host: chart-example.local
-      paths:
-      - path: /
-        backend:
-          serviceName: chart-example.local
-          servicePort: 80
-  tls: []
-  #  - secretName: chart-example-tls
-  #    hosts:
-  #      - chart-example.local
-
-resources: {}
-  # We usually recommend not to specify default resources and to leave this as a conscious
-  # choice for the user. This also increases chances charts run on environments with little
-  # resources, such as Minikube. If you do want to specify resources, uncomment the following
-  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
-  # limits:
-  #   cpu: 100m
-  #   memory: 128Mi
-  # requests:
-  #   cpu: 100m
-  #   memory: 128Mi
-
-autoscaling:
-  enabled: false
-  minReplicas: 1
-  maxReplicas: 100
-  targetCPUUtilizationPercentage: 80
-  # targetMemoryUtilizationPercentage: 80
-
-nodeSelector: {}
-
-tolerations: []
-
-affinity: {}
diff --git a/internal/fileutil/testdata/testdir/testfile b/internal/fileutil/testdata/testdir/testfile
new file mode 100644
index 000000000..5a8e18c53
--- /dev/null
+++ b/internal/fileutil/testdata/testdir/testfile
@@ -0,0 +1 @@
+helm
\ No newline at end of file
diff --git a/pkg/downloader/manager.go b/pkg/downloader/manager.go
index c9a95ace7..882a24125 100644
--- a/pkg/downloader/manager.go
+++ b/pkg/downloader/manager.go
@@ -495,7 +495,7 @@ Loop:
 		}
 
 		// If repo is from git url, continue
-		if strings.HasPrefix(dd.Repository, "git:") {
+		if strings.HasPrefix(dd.Repository, "git://") {
 			continue
 		}