diff --git a/scanslicer/entry.py b/scanslicer/entry.py
index a33f1b9..d658836 100644
--- a/scanslicer/entry.py
+++ b/scanslicer/entry.py
@@ -159,3 +159,7 @@ def main(argv=None):
                 file=sys.stderr,
             )
         return 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())