diff --git a/compose_viz/cli.py b/compose_viz/cli.py
index d2bf1d3..00c1ddd 100644
--- a/compose_viz/cli.py
+++ b/compose_viz/cli.py
@@ -27,23 +27,23 @@ def _version_callback(value: bool) -> None:
 @app.callback()
 def compose_viz(
     input_path: str,
-    output_path: Optional[str] = typer.Option(
-        None,
-        "--output_path",
+    output_path: str = typer.Option(
+        "./compose-viz.png",
+        "--output-path",
         "-o",
-        help="Output path for the generated visualization.",
+        help="Output path for the generated visualization file.",
     ),
     format: VisualizationFormats = typer.Option(
         "PNG",
         "--format",
         "-m",
-        help="Output format for the generated visualization.",
+        help="Output format for the generated visualization file.",
     ),
     _: Optional[bool] = typer.Option(
         None,
         "--version",
         "-v",
-        help="Show the version of compose_viz.",
+        help="Show the version of compose-viz.",
         callback=_version_callback,
         is_eager=True,
     )
@@ -58,4 +58,4 @@ def compose_viz(
 
 
 def start_cli() -> None:
-    app(prog_name=__app_name__)
+    app(prog_name="cpv")