diff --git a/app/src/views/system/SelfCheck/tasks/backend/index.ts b/app/src/views/system/SelfCheck/tasks/backend/index.ts
index 01afe14b..a8881ea1 100644
--- a/app/src/views/system/SelfCheck/tasks/backend/index.ts
+++ b/app/src/views/system/SelfCheck/tasks/backend/index.ts
@@ -21,6 +21,11 @@ const backendTasks: Record<string, BackendTask> = {
     description: () => $gettext('Check if the nginx.conf includes the streams-enabled directory.'),
     type: 'backend',
   },
+  'NginxConf-ConfD': {
+    name: () => $gettext('Nginx Conf Include Conf.d'),
+    description: () => $gettext('Check if the nginx.conf includes the conf.d directory.'),
+    type: 'backend',
+  },
 }
 
 export default backendTasks
diff --git a/internal/self_check/errors.go b/internal/self_check/errors.go
index 202857ba..e745a245 100644
--- a/internal/self_check/errors.go
+++ b/internal/self_check/errors.go
@@ -16,4 +16,5 @@ var (
 	ErrSitesEnabledNotExist             = e.New(4047, "Sites-enabled directory not exist")
 	ErrStreamAvailableNotExist          = e.New(4048, "Streams-available directory not exist")
 	ErrStreamEnabledNotExist            = e.New(4049, "Streams-enabled directory not exist")
+	ErrNginxConfNotIncludeConfD         = e.New(4050, "Nginx conf not include conf.d directory")
 )
diff --git a/internal/self_check/nginx_conf.go b/internal/self_check/nginx_conf.go
index 1d7e2778..49c617c8 100644
--- a/internal/self_check/nginx_conf.go
+++ b/internal/self_check/nginx_conf.go
@@ -3,6 +3,7 @@ package self_check
 import (
 	"fmt"
 	"os"
+	"strings"
 	"time"
 
 	"github.com/0xJacky/Nginx-UI/internal/nginx"
@@ -118,7 +119,7 @@ func FixNginxConfIncludeSites() error {
 	}
 
 	// if no http block, append http block with include sites-enabled/*
-	content = append(content, []byte(fmt.Sprintf("\nhttp {\n\tinclude %s;\n}\n", nginx.GetConfPath("sites-enabled/*")))...)
+	content = append(content, fmt.Appendf(nil, "\nhttp {\n\tinclude %s;\n}\n", nginx.GetConfPath("sites-enabled/*"))...)
 	return os.WriteFile(path, content, 0644)
 }
 
@@ -162,6 +163,84 @@ func FixNginxConfIncludeStreams() error {
 	}
 
 	// if no stream block, append stream block with include streams-enabled/*
-	content = append(content, []byte(fmt.Sprintf("\nstream {\n\tinclude %s;\n}\n", nginx.GetConfPath("streams-enabled/*")))...)
+	content = append(content, fmt.Appendf(nil, "\nstream {\n\tinclude %s;\n}\n", nginx.GetConfPath("streams-enabled/*"))...)
+	return os.WriteFile(path, content, 0644)
+}
+
+// CheckNginxConfIncludeConfD checks if nginx.conf includes conf.d directory
+func CheckNginxConfIncludeConfD() error {
+	path := nginx.GetConfEntryPath()
+
+	content, err := os.ReadFile(path)
+	if err != nil {
+		return ErrFailedToReadNginxConf
+	}
+
+	// parse nginx.conf
+	p := parser.NewStringParser(string(content), parser.WithSkipValidDirectivesErr())
+	c, err := p.Parse()
+	if err != nil {
+		return ErrParseNginxConf
+	}
+
+	// find http block
+	for _, v := range c.Block.Directives {
+		if v.GetName() == "http" {
+			// find include conf.d
+			for _, directive := range v.GetBlock().GetDirectives() {
+				if directive.GetName() == "include" && len(directive.GetParameters()) > 0 &&
+					strings.HasPrefix(directive.GetParameters()[0].Value, nginx.GetConfPath("conf.d")) {
+					return nil
+				}
+			}
+			return ErrNginxConfNotIncludeConfD
+		}
+	}
+
+	return ErrNginxConfNoHttpBlock
+}
+
+// FixNginxConfIncludeConfD attempts to fix nginx.conf to include conf.d directory
+func FixNginxConfIncludeConfD() error {
+	path := nginx.GetConfEntryPath()
+
+	content, err := os.ReadFile(path)
+	if err != nil {
+		return ErrFailedToReadNginxConf
+	}
+
+	// create a backup file (+.bak.timestamp)
+	backupPath := fmt.Sprintf("%s.bak.%d", path, time.Now().Unix())
+	err = os.WriteFile(backupPath, content, 0644)
+	if err != nil {
+		return ErrFailedToCreateBackup
+	}
+
+	// parse nginx.conf
+	p := parser.NewStringParser(string(content), parser.WithSkipValidDirectivesErr())
+	c, err := p.Parse()
+	if err != nil {
+		return ErrParseNginxConf
+	}
+
+	// find http block
+	for _, v := range c.Block.Directives {
+		if v.GetName() == "http" {
+			// add include conf.d/*.conf to http block
+			includeDirective := &config.Directive{
+				Name:       "include",
+				Parameters: []config.Parameter{{Value: nginx.GetConfPath("conf.d/*.conf")}},
+			}
+
+			realBlock := v.GetBlock().(*config.HTTP)
+			realBlock.Directives = append(realBlock.Directives, includeDirective)
+
+			// write to file
+			return os.WriteFile(path, []byte(dumper.DumpBlock(c.Block, dumper.IndentedStyle)), 0644)
+		}
+	}
+
+	// if no http block, append http block with include conf.d/*.conf
+	content = append(content, fmt.Appendf(nil, "\nhttp {\n\tinclude %s;\n}\n", nginx.GetConfPath("conf.d/*.conf"))...)
 	return os.WriteFile(path, content, 0644)
 }
diff --git a/internal/self_check/self_check.go b/internal/self_check/self_check.go
index bef72d49..5f2325a0 100644
--- a/internal/self_check/self_check.go
+++ b/internal/self_check/self_check.go
@@ -40,6 +40,11 @@ var selfCheckTasks = []*Task{
 		CheckFunc: CheckNginxConfIncludeStreams,
 		FixFunc:   FixNginxConfIncludeStreams,
 	},
+	{
+		Name:      "NginxConf-ConfD",
+		CheckFunc: CheckNginxConfIncludeConfD,
+		FixFunc:   FixNginxConfIncludeConfD,
+	},
 }
 
 var selfCheckTaskMap = make(map[string]*Task)