diff --git a/app.go b/app.go
index fcad36d..5e33b2c 100644
--- a/app.go
+++ b/app.go
@@ -112,6 +112,8 @@ func (cui *ConfigUI) App(w http.ResponseWriter, r *http.Request) {
 	}
 
 	data.File.Content = content
-
-	cui.Parse(w, "home", data)
+	err = cui.tmpl.ExecuteTemplate(w, "home", data)
+	if err != nil {
+		panic(err)
+	}
 }
diff --git a/configui.go b/configui.go
index 83bcb7c..f5d7176 100644
--- a/configui.go
+++ b/configui.go
@@ -1,17 +1,16 @@
 package configui
 
 import (
-	"bytes"
 	"embed"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"html/template"
-	"net/http"
 	"os"
 	"time"
 
 	"kumoly.io/lib/klog"
+	"kumoly.io/lib/ksrv/engine"
 	"kumoly.io/tools/configui/public"
 )
 
@@ -54,7 +53,7 @@ type ConfigUI struct {
 	LogLevel int    `json:"log_level"`
 
 	TmplFS   embed.FS `json:"-"`
-	tmpl     *template.Template
+	tmpl     *engine.Engine
 	PublicFS embed.FS     `json:"-"`
 	log      *klog.Logger `json:"-"`
 	ksrv_log *klog.Logger `json:"-"`
@@ -62,7 +61,7 @@ type ConfigUI struct {
 }
 
 func New() *ConfigUI {
-	tmpl := template.Must(template.New("").Funcs(template.FuncMap{
+	tmpl := engine.Must(engine.New("").Funcs(template.FuncMap{
 		"step": func(from, to, step uint) []uint {
 			items := []uint{}
 			for i := from; i <= to; i += step {
@@ -211,13 +210,3 @@ func (cui *ConfigUI) AppendFile(file *File) error {
 	cui.Files = append(cui.Files, file)
 	return nil
 }
-
-func (cui *ConfigUI) Parse(w http.ResponseWriter, name string, data interface{}) error {
-	buf := &bytes.Buffer{}
-	err := cui.tmpl.ExecuteTemplate(buf, "home", data)
-	if err != nil {
-		panic(err)
-	}
-	_, err = w.Write(buf.Bytes())
-	return err
-}
diff --git a/go.mod b/go.mod
index d068adb..3cc0e64 100644
--- a/go.mod
+++ b/go.mod
@@ -3,8 +3,8 @@ module kumoly.io/tools/configui
 go 1.17
 
 require (
-	kumoly.io/lib/klog v0.1.9
-	kumoly.io/lib/ksrv v0.1.4
+	kumoly.io/lib/klog v0.1.10
+	kumoly.io/lib/ksrv v0.1.5-0.20211104040031-77be1d6ae358
 )
 
 require (
diff --git a/go.sum b/go.sum
index 1ef1c21..137a032 100644
--- a/go.sum
+++ b/go.sum
@@ -4,5 +4,9 @@ golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c h1:F1jZWGFhYfh0Ci55sIpILtKKK
 golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 kumoly.io/lib/klog v0.1.9 h1:rS9PPqfyBIIfeQlPSuMv+7StGPiFVuAdp04HDwwDY3E=
 kumoly.io/lib/klog v0.1.9/go.mod h1:Snm+c1xRrh/RbXsxQf7UGYbAJGPcIa6bEEN+CmzJh7M=
+kumoly.io/lib/klog v0.1.10 h1:GJxwcsUct8nF3oHtsJPTIlPKTUeB/+7jsbgh3bMvKMc=
+kumoly.io/lib/klog v0.1.10/go.mod h1:Snm+c1xRrh/RbXsxQf7UGYbAJGPcIa6bEEN+CmzJh7M=
 kumoly.io/lib/ksrv v0.1.4 h1:8zbslRwdNWHw5Wm1PiyDLr6Mu4xxjz0FTW4u8dZ6ZeI=
 kumoly.io/lib/ksrv v0.1.4/go.mod h1:eKfhJR5mOqlQZAy5EUI+Avfxirx2/nNW79r+Ki2C18k=
+kumoly.io/lib/ksrv v0.1.5-0.20211104040031-77be1d6ae358 h1:cVm0fUXzLYZBmhTJf0MRLBt35jLhjodadI8uUh4RNEg=
+kumoly.io/lib/ksrv v0.1.5-0.20211104040031-77be1d6ae358/go.mod h1:Tux6CApi3sYGRM5prDPN2+aw3gKz1Tdf5CU6XFSFxbQ=