diff --git a/dialects/postgres.go b/dialects/postgres.go
index 2b234c66..e76e5b7e 100644
--- a/dialects/postgres.go
+++ b/dialects/postgres.go
@@ -824,6 +824,11 @@ func (db *postgres) SetQuotePolicy(quotePolicy QuotePolicy) {
 	}
 }
 
+// FormatBytes formats bytes
+func (db *postgres) FormatBytes(bs []byte) string {
+	return fmt.Sprintf("E'\\x%x'", bs)
+}
+
 func (db *postgres) SQLType(c *schemas.Column) string {
 	var res string
 	switch t := c.SQLType.Name; t {
diff --git a/engine.go b/engine.go
index 22ba6163..d49eea9a 100644
--- a/engine.go
+++ b/engine.go
@@ -460,7 +460,7 @@ func formatColumnValue(dstDialect dialects.Dialect, d interface{}, col *schemas.
 	if col.SQLType.IsText() {
 		var v string
 		switch reflect.TypeOf(d).Kind() {
-		case reflect.Struct, reflect.Array, reflect.Slice:
+		case reflect.Struct, reflect.Array, reflect.Slice, reflect.Map:
 			bytes, err := json.DefaultJSONHandler.Marshal(d)
 			if err != nil {
 				v = fmt.Sprintf("%s", d)