diff --git a/internal/api/user/create.go b/internal/api/user/create.go
index d915463..0dea279 100644
--- a/internal/api/user/create.go
+++ b/internal/api/user/create.go
@@ -5,6 +5,7 @@ import (
 	"git.0x7f.app/WOJ/woj-server/internal/model"
 	"git.0x7f.app/WOJ/woj-server/internal/service/user"
 	"github.com/gin-gonic/gin"
+	"net/mail"
 )
 
 type createRequest struct {
@@ -31,6 +32,13 @@ func (h *handler) Create(c *gin.Context) {
 		return
 	}
 
+	// verify email is valid
+	_, err := mail.ParseAddress(req.Email)
+	if err != nil {
+		e.Pong[any](c, e.InvalidParameter, nil)
+		return
+	}
+
 	// create user
 	createData := &user.CreateData{
 		Email:    req.Email,