diff --git a/OpenScope/GeneratorBase.py b/OpenScope/GeneratorBase.py
index 289f4cf..2f20c47 100644
--- a/OpenScope/GeneratorBase.py
+++ b/OpenScope/GeneratorBase.py
@@ -147,7 +147,7 @@ def saveProject(self):
         project.setCrs(QgsCoordinateReferenceSystem('EPSG:4326'))
 
         if not project.fileName():
-            project.setFileName(os.path.join(self.getProjectPath(), '%s.qgz' % self.getIcao()))
+            project.setFileName(os.path.join(self.getProjectPath(), '%s.qgs' % self.getIcao()))
 
         project.write()