diff --git a/backend/project/__main__.py b/backend/project/__main__.py
index 32cb974f..444d1410 100644
--- a/backend/project/__main__.py
+++ b/backend/project/__main__.py
@@ -7,4 +7,4 @@
 if __name__ == "__main__":
     load_dotenv()
     app = create_app_with_db(url)
-    app.run(debug=True, host='0.0.0.0', port=4000)
+    app.run(debug=True, host='0.0.0.0')
diff --git a/backend/project/endpoints/projects/project_assignment_file.py b/backend/project/endpoints/projects/project_assignment_file.py
index ac66728d..88e12ac7 100644
--- a/backend/project/endpoints/projects/project_assignment_file.py
+++ b/backend/project/endpoints/projects/project_assignment_file.py
@@ -23,7 +23,7 @@ class ProjectAssignmentFiles(Resource):
     Class for getting the assignment files of a project
     """
 
-    # @authorize_project_visible
+    @authorize_project_visible
     def get(self, project_id):
         """
         Get the assignment files of a project
diff --git a/backend/project/endpoints/projects/project_detail.py b/backend/project/endpoints/projects/project_detail.py
index c945ac60..153dbb66 100644
--- a/backend/project/endpoints/projects/project_detail.py
+++ b/backend/project/endpoints/projects/project_detail.py
@@ -50,6 +50,16 @@ def patch(self, project_id):
         """
         project_json = parse_project_params()
 
+        output, status_code = patch_by_id_from_model(
+            Project,
+            "project_id",
+            project_id,
+            RESPONSE_URL,
+            project_json
+        )
+        if status_code != 200:
+            return output, status_code
+
         if "assignment_file" in request.files:
             file = request.files["assignment_file"]
             filename = os.path.basename(file.filename)
@@ -81,13 +91,7 @@ def patch(self, project_id):
                         },
                         400)
 
-        return patch_by_id_from_model(
-            Project,
-            "project_id",
-            project_id,
-            RESPONSE_URL,
-            project_json
-        )
+        return output, status_code
 
     @authorize_teacher_of_project
     def delete(self, project_id):