diff --git a/providers/src/airflow/providers/google/cloud/openlineage/utils.py b/providers/src/airflow/providers/google/cloud/openlineage/utils.py
index bd72c4db9461e..933c27ea64a4f 100644
--- a/providers/src/airflow/providers/google/cloud/openlineage/utils.py
+++ b/providers/src/airflow/providers/google/cloud/openlineage/utils.py
@@ -332,7 +332,7 @@ class BigQueryJobRunFacet(RunFacet):
 
     cached: bool
     billedBytes: int | None = field(default=None)
-    properties: str | None = field(default=None)
+    properties: dict | None = field(default=None)
 
     @staticmethod
     def _get_schema() -> str: