diff --git a/.gitignore b/.gitignore
index 99e7978e..a882e3ac 100644
--- a/.gitignore
+++ b/.gitignore
@@ -54,3 +54,4 @@ com_crashlytics_export_strings.xml
 crashlytics.properties
 crashlytics-build.properties
 fabric.properties
+.dart_tool
\ No newline at end of file
diff --git a/angel_orm_generator/lib/src/builder/orm/postgres.dart b/angel_orm_generator/lib/src/builder/orm/postgres.dart
index 8ecfa348..44c0f21f 100644
--- a/angel_orm_generator/lib/src/builder/orm/postgres.dart
+++ b/angel_orm_generator/lib/src/builder/orm/postgres.dart
@@ -46,7 +46,7 @@ class PostgresOrmGenerator extends GeneratorForAnnotation<ORM> {
     return prettyToSource(lib);
   }
 
-  Future<LibraryBuilder> generateOrmLibrary(LibraryElement libraryElement,
+  Future<Library> generateOrmLibrary(LibraryElement libraryElement,
       Resolver resolver, BuildStep buildStep) async {
     var lib = new LibraryBuilder();
     lib.addDirective(new ImportBuilder('dart:async'));