diff --git a/src/bonsai/bonsai/tool/project.py b/src/bonsai/bonsai/tool/project.py
index 98f4f76799..53bfe427c5 100644
--- a/src/bonsai/bonsai/tool/project.py
+++ b/src/bonsai/bonsai/tool/project.py
@@ -372,6 +372,10 @@ class Project(bonsai.core.tool.Project):
         props = cls.get_project_props()
         for project_library in libraries:
             library_elements = tool.Project.get_project_library_elements(project_library)
+            subhierarchy = libraries[project_library]
+            for sublibrary in subhierarchy:
+                sublibrary_elements = tool.Project.get_project_library_elements(sublibrary)
+                library_elements.update(sublibrary_elements)
             props.add_library_project_library(
                 project_library.Name or "Unnamed", len(library_elements), project_library.id()
             )