diff --git a/server/error.go b/server/error.go
index effbd32..21689e8 100644
--- a/server/error.go
+++ b/server/error.go
@@ -1,9 +1,8 @@
 package server
 
 import (
-	"fmt"
 	"net/http"
-	"os"
+	"strings"
 
 	"github.com/labstack/echo/v4"
 )
@@ -14,33 +13,8 @@ func httpErrorHandler(err error, c echo.Context) {
 	if httpError, ok := err.(*echo.HTTPError); ok {
 		code = httpError.Code
 	}
-	filePath := fmt.Sprintf("public/%d.html", code)
-	var f *os.File
-	if f, err = os.Open(filePath); err != nil {
-		c.Logger().Error(err)
-		serveError(c, 500)
-		return
-	}
-	if err = c.Stream(code, "text/html", f); err != nil {
-		c.Logger().Error(err)
-		serveError(c, 500)
-		return
+	if strings.Contains(err.Error(), "violates check constraint") {
+		code = 400
 	}
-}
-
-func serveError(c echo.Context, code int) error {
-	var (
-		f   *os.File
-		err error
-	)
-	if f, err = os.Open(fmt.Sprintf("public/%d.html", code)); err != nil {
-		c.Logger().Error(err)
-		return err
-	}
-	// TODO return errors in JSON
-	if err = c.Stream(code, "text/html", f); err != nil {
-		c.Logger().Error(err)
-		return err
-	}
-	return nil
+	c.JSON(code, map[string]any{"status": code})
 }