diff --git a/src/python_inspector/api.py b/src/python_inspector/api.py
index 570a839..ef83671 100644
--- a/src/python_inspector/api.py
+++ b/src/python_inspector/api.py
@@ -208,7 +208,7 @@ def resolve_dependencies(
     if not direct_dependencies:
         return Resolution(
             packages=[],
-            resolution={},
+            resolution=[],
             files=files,
         )
 
diff --git a/tests/data/setup/no-direct-dependencies-setup.py-expected.json b/tests/data/setup/no-direct-dependencies-setup.py-expected.json
index 508b814..e9c5e46 100644
--- a/tests/data/setup/no-direct-dependencies-setup.py-expected.json
+++ b/tests/data/setup/no-direct-dependencies-setup.py-expected.json
@@ -81,5 +81,5 @@
     }
   ],
   "packages": [],
-  "resolved_dependencies_graph": {}
+  "resolved_dependencies_graph": []
 }
\ No newline at end of file