diff --git a/go.mod b/go.mod
index 739bb7e..5486116 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,6 @@ go 1.15
 require (
 	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751
 	github.com/eiblog/blackfriday v0.0.0-20161010144836-c0ec111761ae
-	github.com/eiblog/utils v0.0.0-20181119015747-92c93e218753
 	github.com/gin-contrib/sessions v0.0.3
 	github.com/gin-gonic/gin v1.6.3
 	github.com/gofrs/uuid v3.3.0+incompatible
diff --git a/go.sum b/go.sum
index 1860fd6..c478509 100644
--- a/go.sum
+++ b/go.sum
@@ -24,8 +24,6 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/eiblog/blackfriday v0.0.0-20161010144836-c0ec111761ae h1:V6YC640Gs5jEUYfCimyuXsTW5gzNcIEESG4MGmOJCtA=
 github.com/eiblog/blackfriday v0.0.0-20161010144836-c0ec111761ae/go.mod h1:HzHqTCGEAkSSzBM3shBvQHsHRQYUvjNOIC4mHipZ6tI=
-github.com/eiblog/utils v0.0.0-20181119015747-92c93e218753 h1:Nygjtnh1nF5zejJF7pZnsoFh77wOPS+jlfhikjkJg60=
-github.com/eiblog/utils v0.0.0-20181119015747-92c93e218753/go.mod h1:mZHWnipRp41yw/rti2DgpbMiBE5i6ifqg7PKooEwRh4=
 github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.9-0.20201210154907-fd9021fe5dad/go.mod h1:cXg6YxExXjJnVBQHBLXeUAgxn2UodCpnH306RInaBQk=
diff --git a/pkg/core/blog/file/timer.go b/pkg/core/blog/file/timer.go
index 295ed6e..266d236 100644
--- a/pkg/core/blog/file/timer.go
+++ b/pkg/core/blog/file/timer.go
@@ -9,8 +9,8 @@ import (
 
 	"github.com/eiblog/eiblog/pkg/cache"
 	"github.com/eiblog/eiblog/pkg/config"
+	"github.com/eiblog/eiblog/tools"
 
-	"github.com/eiblog/utils/tmpl"
 	"github.com/sirupsen/logrus"
 )
 
@@ -21,7 +21,7 @@ func init() {
 
 	var err error
 	xmlTmpl, err = template.New("").Funcs(template.FuncMap{
-		"dateformat": tmpl.DateFormat,
+		"dateformat": tools.DateFormat,
 	}).ParseGlob(root)
 	if err != nil {
 		panic(err)
diff --git a/pkg/core/blog/page/page.go b/pkg/core/blog/page/page.go
index 90f1795..620febc 100644
--- a/pkg/core/blog/page/page.go
+++ b/pkg/core/blog/page/page.go
@@ -8,7 +8,6 @@ import (
 	"github.com/eiblog/eiblog/pkg/config"
 	"github.com/eiblog/eiblog/tools"
 
-	"github.com/eiblog/utils/tmpl"
 	"github.com/gin-gonic/gin"
 )
 
@@ -16,7 +15,7 @@ import (
 var htmlTmpl *template.Template
 
 func init() {
-	htmlTmpl = template.New("eiblog").Funcs(tmpl.TplFuncMap)
+	htmlTmpl = template.New("eiblog").Funcs(tools.TplFuncMap)
 	root := filepath.Join(config.WorkDir, "website")
 	files := tools.ReadDirFiles(root, func(name string) bool {
 		if name == ".DS_Store" {
diff --git a/tools/tmplfunc.go b/tools/tmplfunc.go
new file mode 100644
index 0000000..6814de9
--- /dev/null
+++ b/tools/tmplfunc.go
@@ -0,0 +1,65 @@
+// Package tools provides ...
+package tools
+
+import (
+	"encoding/base64"
+	htmpl "html/template"
+	"io/ioutil"
+	"log"
+	"net/http"
+	"strings"
+	"text/template"
+	"time"
+)
+
+var TplFuncMap = make(template.FuncMap)
+
+func init() {
+	TplFuncMap["dateformat"] = DateFormat
+	TplFuncMap["str2html"] = Str2html
+	TplFuncMap["join"] = Join
+	TplFuncMap["isnotzero"] = IsNotZero
+	TplFuncMap["getavatar"] = GetAvatar
+}
+
+func Str2html(raw string) htmpl.HTML {
+	return htmpl.HTML(raw)
+}
+
+// DateFormat takes a time and a layout string and returns a string with the formatted date. Used by the template parser as "dateformat"
+func DateFormat(t time.Time, layout string) string {
+	return t.Format(layout)
+}
+
+func Join(a []string, sep string) string {
+	return strings.Join(a, sep)
+}
+
+func IsNotZero(t time.Time) bool {
+	return !t.IsZero()
+}
+
+// cache avatar image
+// url: https://<static_domain>/static/img/avatar.png
+var avatar string
+
+func GetAvatar(domain string) string {
+	if avatar == "" {
+		resp, err := http.Get("https://" + domain + "/static/img/avatar.png")
+		if err != nil {
+			log.Println(err)
+			return ""
+		}
+		defer resp.Body.Close()
+
+		data, err := ioutil.ReadAll(resp.Body)
+		if err != nil {
+			log.Println(err)
+			return ""
+		}
+
+		avatar = "data:" + resp.Header.Get("content-type") + ";base64," + base64.StdEncoding.EncodeToString(data)
+	}
+
+	return avatar
+}