diff --git a/opendm/osfm.py b/opendm/osfm.py
index fd8235e5..28e02b95 100644
--- a/opendm/osfm.py
+++ b/opendm/osfm.py
@@ -156,12 +156,14 @@ class OSFMContext:
                                             True)
             tools.apply_transformations(transformations)
 
-
-            with open(alignment_file, 'w') as fout:
-                fout.write("Alignment done!\n")
+            self.touch(alignment_file)
         else:
             log.ODM_WARNING('Found a alignment done progress file in: %s' % alignment_file)
 
+    def touch(self, file):
+        with open(file, 'w') as fout:
+            fout.write("Done!\n")
+
     def path(self, *paths):
         return os.path.join(self.opensfm_project_path, *paths)
 
diff --git a/stages/run_opensfm.py b/stages/run_opensfm.py
index 3af20f34..3e555107 100644
--- a/stages/run_opensfm.py
+++ b/stages/run_opensfm.py
@@ -42,7 +42,10 @@ class ODMOpenSfMStage(types.ODM_Stage):
         else:
             output_file = tree.opensfm_reconstruction
 
-        octx.update_config({'undistorted_image_max_size': gsd.image_max_size(photos, args.orthophoto_resolution, tree.opensfm_reconstruction, ignore_gsd=args.ignore_gsd)})
+        updated_config_flag_file = octx.path('updated_config.txt')
+        if not io.file_exists(updated_config_flag_file) or self.rerun():
+            octx.update_config({'undistorted_image_max_size': gsd.image_max_size(photos, args.orthophoto_resolution, tree.opensfm_reconstruction, ignore_gsd=args.ignore_gsd)})
+            octx.touch(updated_config_flag_file)
 
         # These will be used for texturing
         undistorted_images_path = octx.path("undistorted")