diff --git a/stat/frequency.py b/stat/frequency.py
index d92c8fc..5633799 100644
--- a/stat/frequency.py
+++ b/stat/frequency.py
@@ -39,10 +39,10 @@ def plot_freq(stats_df: pd.DataFrame, title: str) -> go.Figure:
     return fig
 
 if __name__ == "__main__":
-    parser = argparse.ArgumentParser(description="Analyze CAN bus frequency.")
-    parser.add_argument("-i", "--input", type=Path, required=True)
-    parser.add_argument("-o", "--output", type=Path, default=Path("freq_report.html"))
-    parser.add_argument("-t", "--title", type=str, default="CAN Bus Message Frequency")
+    parser = argparse.ArgumentParser(description="Analyze CAN bus message frequency")
+    parser.add_argument("input", type=Path, help="Path to the input CAN log file")
+    parser.add_argument("output", type=Path, nargs="?", default=Path("freq_report.html"), help="Path to the output HTML report")
+    parser.add_argument("title", nargs="?", default="CAN Bus Message Frequency", help="Title for the HTML report")
     args = parser.parse_args()
 
     df = load_data(args.input)