diff --git a/src/streamlit_app.py b/src/streamlit_app.py
index d00f7f0..18b289a 100644
--- a/src/streamlit_app.py
+++ b/src/streamlit_app.py
@@ -215,14 +215,14 @@ with col1:
                         root.wm_attributes('-topmost', 1)
                         root.after(10)  # Add a small delay
                         # Create and run the main loop in a way that doesn't block
-                        path = None
+                        path_holder = []
                         def select_dir():
-                            nonlocal path
                             path = filedialog.askdirectory(title="Select Source Directory")
+                            path_holder.append(path)
                             root.quit()
                         root.after(20, select_dir)
                         root.mainloop()
-                        if path:
+                        if path_holder and path_holder[0]:
                             st.session_state['source_dir_selected'] = path
                             st.rerun()
                         root.destroy()
@@ -272,14 +272,14 @@ with col1:
                         root.wm_attributes('-topmost', 1)
                         root.after(10)  # Add a small delay
                         # Create and run the main loop in a way that doesn't block
-                        path = None
+                        path_holder = []
                         def select_dir():
-                            nonlocal path
                             path = filedialog.askdirectory(title="Select Destination Directory")
+                            path_holder.append(path)
                             root.quit()
                         root.after(20, select_dir)
                         root.mainloop()
-                        if path:
+                        if path_holder and path_holder[0]:
                             st.session_state['dest_dir_selected'] = path
                             st.rerun()
                         root.destroy()