diff --git a/pyinstaller.spec b/pyinstaller.spec
index cae0a2a..1affd8a 100644
--- a/pyinstaller.spec
+++ b/pyinstaller.spec
@@ -34,7 +34,7 @@ a = Analysis(['run.py'],
                             'pyqtgraph.imageview.ImageViewTemplate_pyqt5', 'debugpy', 'xmlrpc',
                             'zmq.backend', 'cq_warehouse', 'cq_warehouse.bearing', 'cq_warehouse.chain',
                             'cq_warehouse.drafting', 'cq_warehouse.extensions', 'cq_warehouse.fastener',
-                            'cq_warehouse.sprocket', 'cq_warehouse.thread', 'cq_gears', 'cq_cache'] + hiddenimports1 + hiddenimports2,
+                            'cq_warehouse.sprocket', 'cq_warehouse.thread', 'cq_gears', 'cq_cache', 'build123d'] + hiddenimports1 + hiddenimports2,
              hookspath=[],
              runtime_hooks=['pyinstaller/pyi_rth_occ.py',
                             'pyinstaller/pyi_rth_fontconfig.py'],