diff --git a/datasource/datasource.go b/datasource/datasource.go
index c5c315038..e75d8f448 100644
--- a/datasource/datasource.go
+++ b/datasource/datasource.go
@@ -2,7 +2,6 @@ package datasource
 
 import (
 	"bytes"
-	"context"
 	"encoding/json"
 	"io"
 	"net/http"
@@ -11,7 +10,7 @@ import (
 	"strings"
 	"time"
 
-	"github.com/google/go-github/v58/github"
+	"github.com/k1LoW/ghfs"
 	"github.com/k1LoW/go-github-client/v58/factory"
 	"github.com/k1LoW/tbls/config"
 	"github.com/k1LoW/tbls/drivers"
@@ -167,25 +166,22 @@ func AnalyzeGitHubContent(dsn config.DSN) (*schema.Schema, error) {
 	if len(splitted) != 3 {
 		return nil, errors.Errorf("invalid dsn: %s", dsn)
 	}
-	ctx := context.Background()
 	s := &schema.Schema{}
 	options := []factory.Option{factory.OwnerRepo(splitted[0] + "/" + splitted[1])}
 	c, err := factory.NewGithubClient(options...)
 	if err != nil {
 		return nil, errors.WithStack(err)
 	}
-	f, _, _, err := c.Repositories.GetContents(ctx, splitted[0], splitted[1], splitted[2], &github.RepositoryContentGetOptions{})
+	o := ghfs.Client(c)
+	fsys, err := ghfs.New(splitted[0], splitted[1], o)
 	if err != nil {
 		return nil, errors.WithStack(err)
 	}
-	if f == nil {
-		return nil, errors.Errorf("invalid dsn: %s", dsn)
-	}
-	cc, err := f.GetContent()
+	b, err := fsys.ReadFile(splitted[2])
 	if err != nil {
 		return nil, errors.WithStack(err)
 	}
-	dec := json.NewDecoder(strings.NewReader(cc))
+	dec := json.NewDecoder(bytes.NewReader(b))
 	if err := dec.Decode(s); err != nil {
 		return s, errors.WithStack(err)
 	}
diff --git a/go.mod b/go.mod
index 9ff7e3d7d..89fc3ebdd 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/k1LoW/tbls
 
-go 1.22.1
+go 1.22.2
 
 require (
 	cloud.google.com/go/bigquery v1.61.0
@@ -109,6 +109,7 @@ require (
 	github.com/josharian/txtarfs v0.0.0-20210615234325-77aca6df5bca // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/k1LoW/fontdir v0.1.1 // indirect
+	github.com/k1LoW/ghfs v1.3.1 // indirect
 	github.com/klauspost/compress v1.17.4 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.6 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
diff --git a/go.sum b/go.sum
index 581fc99da..4f9392e06 100644
--- a/go.sum
+++ b/go.sum
@@ -247,6 +247,8 @@ github.com/k1LoW/ffff v0.2.0/go.mod h1:XuWQte6DCVCGKkvfeOFHTihuYWusf7dU+kp9jot7F
 github.com/k1LoW/fontdir v0.1.0/go.mod h1:9Zbr3T3BXZ5ypr1BM/JwzZN4bqBvl1+JnSTTg1c+zHg=
 github.com/k1LoW/fontdir v0.1.1 h1:MGpv3LbkbpdVsEX6BCtsYeoQUZSzvb1RF1c/cfumUUw=
 github.com/k1LoW/fontdir v0.1.1/go.mod h1:9Zbr3T3BXZ5ypr1BM/JwzZN4bqBvl1+JnSTTg1c+zHg=
+github.com/k1LoW/ghfs v1.3.1 h1:xq/VenCDhSUDf1IsL0LBfWIn3QTCOOd8+pE0SNZF6wM=
+github.com/k1LoW/ghfs v1.3.1/go.mod h1:IaAooDKpTdx/I0lSethYNMowo0rs0h/+btPPHdZlnE4=
 github.com/k1LoW/go-github-client/v58 v58.0.12 h1:rIK+H2cSpK0ptOxNq0jITGu3ffRjLTe5ITCz1jik5c0=
 github.com/k1LoW/go-github-client/v58 v58.0.12/go.mod h1:HFCYt6OBzCfusKY4aVYi4E3T4pbDDNdHQuWOL0pHkdI=
 github.com/klauspost/compress v1.17.4 h1:Ej5ixsIri7BrIjBkRZLTo6ghwrEtHFk7ijlczPW4fZ4=