diff --git a/ocp_resources/data_source.py b/ocp_resources/data_source.py
index 7645b89e67..7119998880 100644
--- a/ocp_resources/data_source.py
+++ b/ocp_resources/data_source.py
@@ -35,7 +35,7 @@ def to_dict(self):
             if not self._source:
                 raise ValueError("Passing yaml_file or parameter 'source' is required")
 
-            self.res["spec"]["source"] = self._source
+            self.res.update({"spec": {"source": self._source}})
 
     @property
     def pvc(self):