diff --git a/insert_build.go b/insert_build.go
index 1d293ee..31fe919 100644
--- a/insert_build.go
+++ b/insert_build.go
@@ -137,7 +137,7 @@ func formatRowValues(values ...any) string {
 			}
 		case sql.NullTime:
 			if v.Valid {
-				formattedValues[i] = fmt.Sprintf("'%s'", v.Time.Format(time.RFC3339))
+				formattedValues[i] = fmt.Sprintf("'%s'", v.Time.Format(time.RFC3339Nano))
 			} else {
 				formattedValues[i] = "null"
 			}
@@ -148,7 +148,7 @@ func formatRowValues(values ...any) string {
 		case nil:
 			formattedValues[i] = "null"
 		case time.Time:
-			formattedValues[i] = fmt.Sprintf("'%s'", v.Format(time.RFC3339))
+			formattedValues[i] = fmt.Sprintf("'%s'", v.Format(time.RFC3339Nano))
 		default:
 			if reflect.TypeOf(val).Kind() == reflect.Ptr && reflect.ValueOf(val).IsNil() {
 				formattedValues[i] = "null"