diff --git a/pkg/conf/datasource/file/file.go b/pkg/conf/datasource/file/file.go
index 09421020ab..e46fd2e9d2 100644
--- a/pkg/conf/datasource/file/file.go
+++ b/pkg/conf/datasource/file/file.go
@@ -19,6 +19,7 @@ import (
 	"log"
 	"path/filepath"
 
+	"github.com/douyu/jupiter/pkg/conf"
 	"github.com/douyu/jupiter/pkg/util/xfile"
 	"github.com/douyu/jupiter/pkg/util/xgo"
 	"github.com/douyu/jupiter/pkg/xlog"
@@ -33,8 +34,8 @@ type fileDataSource struct {
 	changed     chan struct{}
 }
 
-// NewDataSource returns new fileDataSource.
-func NewDataSource(path string, watch bool) *fileDataSource {
+// NewDataSource returns a file-backed configuration data source.
+func NewDataSource(path string, watch bool) conf.DataSource {
 	absolutePath, err := filepath.Abs(path)
 	if err != nil {
 		xlog.Jupiter().Panic("new datasource", xlog.Any("err", err))
diff --git a/pkg/conf/datasource/http/yasee.go b/pkg/conf/datasource/http/yasee.go
index 2816d69574..04bc55979e 100644
--- a/pkg/conf/datasource/http/yasee.go
+++ b/pkg/conf/datasource/http/yasee.go
@@ -22,6 +22,7 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/douyu/jupiter/pkg/conf"
 	"github.com/douyu/jupiter/pkg/util/xgo"
 	"github.com/douyu/jupiter/pkg/xlog"
 	"github.com/go-resty/resty/v2"
@@ -52,8 +53,8 @@ type ConfigData struct {
 	LastRevision int64  `json:"last_revision"`
 }
 
-// NewDataSource ...
-func NewDataSource(addr string, enableWatch bool) *yaseeDataSource {
+// NewDataSource returns an HTTP-backed configuration data source.
+func NewDataSource(addr string, enableWatch bool) conf.DataSource {
 	yasee := &yaseeDataSource{
 		client:      resty.New(),
 		addr:        addr,