diff --git a/amarillo/plugins/grfs_export/gtfs_export.py b/amarillo/plugins/grfs_export/gtfs_export.py
index d0cee0e..2317e62 100644
--- a/amarillo/plugins/grfs_export/gtfs_export.py
+++ b/amarillo/plugins/grfs_export/gtfs_export.py
@@ -103,8 +103,9 @@ class GtfsExport:
             current_trip.route_id = current_route_id
 
             for other_id, other_trip in list(ungrouped_trips.items()):
-                # if an ungrouped trip is close to any of the grouped trips, add it to the route group
-                if (any(self.trips_are_close(other_trip, grouped_trip) for grouped_trip in current_group.values())):
+                # if an ungrouped trip is from the same agency close to any of the grouped trips, add it to the route group
+                # TODO: it should be possible to optimize this
+                if (any(grouped_trip.agency == other_trip.agency and self.trips_are_close(other_trip, grouped_trip) for grouped_trip in current_group.values())):
                     current_group[other_id] = ungrouped_trips.pop(other_id)
                     current_group[other_id].route_id = current_route_id
 
diff --git a/pyproject.toml b/pyproject.toml
index 1422f8a..182bed6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "amarillo-grfs-export"
-version = "0.0.2"
+version = "0.0.3"
 dependencies = [
     "amarillo",
     "amarillo-enhancer",