diff --git a/go.mod b/go.mod
index 38dbb1c..12c9ce7 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/fthvgb1/wp-go
 
-go 1.20
+go 1.19
 
 require (
 	github.com/dlclark/regexp2 v1.7.0
diff --git a/helper/strings/strings.go b/helper/strings/strings.go
index ee0811d..3df5779 100644
--- a/helper/strings/strings.go
+++ b/helper/strings/strings.go
@@ -2,7 +2,6 @@ package strings
 
 import (
 	"crypto/md5"
-	"errors"
 	"fmt"
 	"golang.org/x/exp/constraints"
 	"io"
@@ -61,16 +60,14 @@ func NewBuilder() *Builder {
 	return &Builder{&strings.Builder{}}
 }
 
-func (b *Builder) WriteString(s ...string) (count int, err error) {
+func (b *Builder) WriteString(s ...string) (count int) {
 	for _, ss := range s {
-		i, er := b.Builder.WriteString(ss)
-		if er != nil {
-			err = errors.Join(er)
-		}
+		i, _ := b.Builder.WriteString(ss)
 		count += i
 	}
 	return
 }
-func (b *Builder) Sprintf(format string, a ...any) (int, error) {
-	return b.WriteString(fmt.Sprintf(format, a...))
+func (b *Builder) Sprintf(format string, a ...any) int {
+	i, _ := fmt.Fprintf(b, format, a...)
+	return i
 }
diff --git a/helper/strings/strings_test.go b/helper/strings/strings_test.go
index 86d10f3..33f75f8 100644
--- a/helper/strings/strings_test.go
+++ b/helper/strings/strings_test.go
@@ -86,11 +86,8 @@ func TestBuilder_WriteString(t *testing.T) {
 			b := &Builder{
 				Builder: tt.fields.Builder,
 			}
-			gotCount, err := b.WriteString(tt.args.s...)
-			if (err != nil) != tt.wantErr {
-				t.Errorf("WriteString() error = %v, wantErr %v", err, tt.wantErr)
-				return
-			}
+			gotCount := b.WriteString(tt.args.s...)
+
 			if gotCount != tt.wantCount {
 				t.Errorf("WriteString() gotCount = %v, want %v", gotCount, tt.wantCount)
 			}
diff --git a/internal/middleware/sendmail.go b/internal/middleware/sendmail.go
index aded58d..427c8c1 100644
--- a/internal/middleware/sendmail.go
+++ b/internal/middleware/sendmail.go
@@ -3,6 +3,7 @@ package middleware
 import (
 	"bytes"
 	"fmt"
+	str "github.com/fthvgb1/wp-go/helper/strings"
 	"github.com/fthvgb1/wp-go/internal/mail"
 	"github.com/fthvgb1/wp-go/internal/pkg/config"
 	"github.com/fthvgb1/wp-go/internal/pkg/logs"
@@ -64,17 +65,13 @@ var (
 )
 
 func formatStack(s string) (r string) {
-	ss := strings.Builder{}
+	ss := str.NewBuilder()
 	t := strings.Split(s, "\n")
 	for i, line := range t {
 		if i%2 == 0 {
-			ss.WriteString("<dt>")
-			ss.WriteString(line)
-			ss.WriteString("</dt>")
+			ss.WriteString("<dt>", line, "</dt>")
 		} else {
-			ss.WriteString("<dd>")
-			ss.WriteString(strings.Trim(line, "\t"))
-			ss.WriteString("</dd>")
+			ss.WriteString("<dt>", strings.Trim(line, "\t"), "</dt>")
 		}
 	}
 	r = ss.String()
diff --git a/internal/plugins/comment.go b/internal/plugins/comment.go
index d3e3cff..72c689e 100644
--- a/internal/plugins/comment.go
+++ b/internal/plugins/comment.go
@@ -2,6 +2,7 @@ package plugins
 
 import (
 	"github.com/fthvgb1/wp-go/helper/slice"
+	str "github.com/fthvgb1/wp-go/helper/strings"
 	"github.com/fthvgb1/wp-go/internal/pkg/models"
 	"github.com/gin-gonic/gin"
 	"net/url"
@@ -50,7 +51,7 @@ func FormatComments(c *gin.Context, i CommentHtml, comments []models.Comments, m
 }
 
 func (d CommentHandler) formatComment(comments []*Comments, isTop bool) (html string) {
-	s := strings.Builder{}
+	s := str.NewBuilder()
 	if d.depth > d.maxDepth {
 		comments = d.findComments(comments)
 	}
@@ -69,9 +70,7 @@ func (d CommentHandler) formatComment(comments []*Comments, isTop bool) (html st
 		s.WriteString(d.i.FormatLi(d.Context, comment.Comments, d.depth, d.isTls, eo, parent))
 		if fl {
 			d.depth++
-			s.WriteString(`<ol class="children">`)
-			s.WriteString(d.formatComment(comment.Children, false))
-			s.WriteString(`</ol>`)
+			s.WriteString(`<ol class="children">`, d.formatComment(comment.Children, false), `</ol>`)
 			if isTop {
 				d.depth = 1
 			}
diff --git a/internal/theme/common/custombackground.go b/internal/theme/common/custombackground.go
index f786f2e..35a5ab2 100644
--- a/internal/theme/common/custombackground.go
+++ b/internal/theme/common/custombackground.go
@@ -4,9 +4,9 @@ import (
 	"fmt"
 	"github.com/fthvgb1/wp-go/helper"
 	"github.com/fthvgb1/wp-go/helper/maps"
+	str "github.com/fthvgb1/wp-go/helper/strings"
 	"github.com/fthvgb1/wp-go/internal/wpconfig"
 	"github.com/fthvgb1/wp-go/safety"
-	"strings"
 )
 
 var postx = map[string]string{
@@ -50,11 +50,9 @@ func (h *Handle) CalCustomBackGround() (r string) {
 	if mods.BackgroundImage == "" && mods.BackgroundColor == mods.ThemeSupport.CustomBackground.DefaultColor {
 		return
 	}
-	s := strings.Builder{}
+	s := str.NewBuilder()
 	if mods.BackgroundImage != "" {
-		s.WriteString(` background-image: url("`)
-		s.WriteString(helper.CutUrlHost(mods.BackgroundImage))
-		s.WriteString(`");`)
+		s.Sprintf(` background-image: url("%s");`, helper.CutUrlHost(mods.BackgroundImage))
 	}
 	backgroundPositionX := helper.Defaults(mods.BackgroundPositionX, mods.ThemeSupport.CustomBackground.DefaultPositionX)
 	backgroundPositionX = maps.WithDefaultVal(postx, backgroundPositionX, "left")
@@ -74,10 +72,7 @@ func (h *Handle) CalCustomBackGround() (r string) {
 	attachment := helper.Defaults(mods.BackgroundAttachment, mods.ThemeSupport.CustomBackground.DefaultAttachment)
 	attachment = helper.Or(attachment == "fixed", "fixed", "scroll")
 	attachment = fmt.Sprintf(" background-attachment: %s;", attachment)
-	s.WriteString(positon)
-	s.WriteString(siz)
-	s.WriteString(repeats)
-	s.WriteString(attachment)
+	s.WriteString(positon, siz, repeats, attachment)
 	r = fmt.Sprintf(`<style id="custom-background-css">
 body.custom-background {%s}
 </style>`, s.String())