diff --git a/oephys2nix/main.py b/oephys2nix/main.py
index 200850b..d02fb45 100644
--- a/oephys2nix/main.py
+++ b/oephys2nix/main.py
@@ -131,6 +131,7 @@ def convert(
         stim = StimulusToNix(open_ephys, str(relacs), str(nix_path))
         stim.create_repros_automatically()
         stim.print_table()
+        stim.close()
 
 
 @app.command()