diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6ba3459..6315e06 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -37,6 +37,8 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
     runs-on: ${{ matrix.os }}
+    env:
+      DEBUG: true
     steps:
       - name: Check out source code
         uses: actions/checkout@v3
@@ -68,7 +70,7 @@ jobs:
         with:
           repo: k1LoW/tbls
           force: true
-          gh-setup-version: v0.7.0
+          gh-setup-version: v0.7.1
 
       - name: Run setup as a action (2/2)
         run: tbls version
@@ -80,7 +82,7 @@ jobs:
           github-token: ''
           repo: k1LoW/colr
           force: true
-          gh-setup-version: v0.7.0
+          gh-setup-version: v0.7.1
 
       - name: Run setup as a action (no credentials) (2/2)
         run: colr -v
diff --git a/cmd/root.go b/cmd/root.go
index 59e72b2..7a11e51 100644
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -25,6 +25,8 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"io"
+	"log"
 	"os"
 
 	"github.com/k1LoW/gh-setup/gh"
@@ -88,8 +90,15 @@ var rootCmd = &cobra.Command{
 }
 
 func Execute() {
-	err := rootCmd.Execute()
-	if err != nil {
+	rootCmd.SetOut(os.Stdout)
+	rootCmd.SetErr(os.Stderr)
+
+	log.SetOutput(io.Discard)
+	if env := os.Getenv("DEBUG"); env != "" {
+		log.SetOutput(os.Stderr)
+	}
+
+	if err := rootCmd.Execute(); err != nil {
 		os.Exit(1)
 	}
 }
diff --git a/gh/gh.go b/gh/gh.go
index 77794b8..93cca2f 100644
--- a/gh/gh.go
+++ b/gh/gh.go
@@ -9,6 +9,7 @@ import (
 	"fmt"
 	"io"
 	"io/fs"
+	"log"
 	"net/http"
 	"regexp"
 	"runtime"
@@ -176,10 +177,12 @@ func makeFS(owner, repo string, a *github.ReleaseAsset) (fs.FS, error) {
 	if err != nil {
 		return nil, err
 	}
-	switch a.GetContentType() {
-	case "application/zip", "application/x-zip-compressed":
+	cts := []string{a.GetContentType(), http.DetectContentType(b)}
+	log.Println("asset content type:", cts)
+	switch {
+	case matchContentTypes([]string{"application/zip", "application/x-zip-compressed"}, cts):
 		return zip.NewReader(bytes.NewReader(b), int64(len(b)))
-	case "application/gzip":
+	case matchContentTypes([]string{"application/gzip", "application/x-gzip"}, cts):
 		gr, err := gzip.NewReader(bytes.NewReader(b))
 		if err != nil {
 			return nil, err
@@ -204,7 +207,7 @@ func makeFS(owner, repo string, a *github.ReleaseAsset) (fs.FS, error) {
 			}
 			return fsys, nil
 		}
-	case "application/octet-stream":
+	case matchContentTypes([]string{"application/octet-stream"}, cts):
 		fsys := fstest.MapFS{}
 		fsys[repo] = &fstest.MapFile{
 			Data:    b,
@@ -295,3 +298,14 @@ func httpClient() (*http.Client, error) {
 	}
 	return client, nil
 }
+
+func matchContentTypes(m, ct []string) bool {
+	for _, v := range m {
+		for _, vv := range ct {
+			if v == vv {
+				return true
+			}
+		}
+	}
+	return false
+}
diff --git a/setup/setup.go b/setup/setup.go
index d25156d..daa70db 100644
--- a/setup/setup.go
+++ b/setup/setup.go
@@ -4,6 +4,7 @@ import (
 	"errors"
 	"fmt"
 	"io/fs"
+	"log"
 	"net/http"
 	"os"
 	"path/filepath"
@@ -24,6 +25,7 @@ func Bin(fsys fs.FS, bd string, force bool) (map[string]string, error) {
 		}
 	}
 	if err := fs.WalkDir(fsys, ".", func(path string, d fs.DirEntry, err error) error {
+		log.Println("extract file:", path)
 		if err != nil {
 			return err
 		}
@@ -158,6 +160,7 @@ func isBinary(b []byte) bool {
 	// FIXME: On Windows, it can't be detected at all.
 	const binaryContentType = "application/octet-stream"
 	contentType := http.DetectContentType(b)
+	log.Println("content type:", contentType)
 	if contentType == binaryContentType {
 		return true
 	}
@@ -165,6 +168,7 @@ func isBinary(b []byte) bool {
 	if err != nil {
 		return false
 	}
+	log.Printf("file type: %v\n", typ)
 	if typ == filetype.Unknown {
 		return true
 	}