diff --git a/pkg/services/accounts.go b/pkg/services/accounts.go
index f9e9be8..7a4dd54 100644
--- a/pkg/services/accounts.go
+++ b/pkg/services/accounts.go
@@ -3,6 +3,9 @@ package services
 import (
 	"code.smartsheep.studio/hydrogen/interactive/pkg/database"
 	"code.smartsheep.studio/hydrogen/interactive/pkg/models"
+	"fmt"
+	"github.com/gofiber/fiber/v2"
+	"github.com/spf13/viper"
 )
 
 func FollowAccount(followerId, followingId uint) error {
@@ -28,3 +31,23 @@ func GetAccountFollowed(user models.Account, target models.Account) (models.Acco
 		Error
 	return relationship, err == nil
 }
+
+func NotifyAccount(user models.Account, subject, content string, links ...fiber.Map) error {
+	agent := fiber.Post(viper.GetString("passport.endpoint") + "/api/dev/notify")
+	agent.JSON(fiber.Map{
+		"client_id":     viper.GetString("passport.client_id"),
+		"client_secret": viper.GetString("passport.client_secret"),
+		"subject":       subject,
+		"content":       content,
+		"links":         links,
+		"user_id":       user.ExternalID,
+	})
+
+	if status, body, errs := agent.Bytes(); len(errs) > 0 {
+		return errs[0]
+	} else if status != 200 {
+		return fmt.Errorf(string(body))
+	}
+
+	return nil
+}
diff --git a/pkg/services/posts.go b/pkg/services/posts.go
index a7ee191..cfc4e6f 100644
--- a/pkg/services/posts.go
+++ b/pkg/services/posts.go
@@ -3,6 +3,8 @@ package services
 import (
 	"errors"
 	"fmt"
+	"github.com/gofiber/fiber/v2"
+	"github.com/rs/zerolog/log"
 	"time"
 
 	"code.smartsheep.studio/hydrogen/interactive/pkg/database"
@@ -174,6 +176,26 @@ func NewPost(
 		return post, err
 	}
 
+	if post.ReplyID != nil {
+		var op models.Post
+		if err := database.C.Where(&models.Post{
+			BaseModel: models.BaseModel{ID: *post.ReplyID},
+		}).Preload("Author").First(&op).Error; err == nil {
+			if op.Author.ID != user.ID {
+				postUrl := fmt.Sprintf("https://%s/posts/%d", viper.GetString("domain"), post.ID)
+				err := NotifyAccount(
+					op.Author,
+					fmt.Sprintf("%s replied you", user.Name),
+					fmt.Sprintf("%s replied your post. Check it out!", user.Name),
+					fiber.Map{"label": "Related post", "url": postUrl},
+				)
+				if err != nil {
+					log.Error().Err(err).Msg("An error occurred when notifying user...")
+				}
+			}
+		}
+	}
+
 	return post, nil
 }