diff --git a/src/main.rs b/src/main.rs
index 655c47b..927863c 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -66,7 +66,7 @@ struct DbOpt {
     #[structopt(
         long = "database",
         help = "Database file path",
-        default_value = "database.json"
+        default_value = "database.db"
     )]
     database_file_path: PathBuf,