diff --git a/src/Resolvers/SchemaRulesResolverPgSql.php b/src/Resolvers/SchemaRulesResolverPgSql.php
index 02c736e..107bc2c 100644
--- a/src/Resolvers/SchemaRulesResolverPgSql.php
+++ b/src/Resolvers/SchemaRulesResolverPgSql.php
@@ -24,7 +24,7 @@ protected function getColumnsDefinitionsFromTable()
             '
             SELECT column_name, data_type, character_maximum_length, is_nullable, column_default
                 FROM INFORMATION_SCHEMA.COLUMNS
-            WHERE table_name = :table',
+            WHERE table_name = :table ORDER BY ordinal_position',
             ['table' => $tableName]
         ))->keyBy('column_name')->toArray();