diff --git a/src/argument.rs b/src/argument.rs
index 2d3b7a7..e784778 100644
--- a/src/argument.rs
+++ b/src/argument.rs
@@ -8,8 +8,8 @@ pub struct Argument {
     pub index: Option<String>,
 
     /// Limit channel items (unlimited by default)
-    #[arg(short, long, default_value_t = 0)]
-    pub limit: usize,
+    #[arg(short, long)]
+    pub limit: Option<usize>,
 
     /// Show output (`dw` by default)
     #[arg(short, long, default_value_t = String::from("dw"))]
diff --git a/src/main.rs b/src/main.rs
index a32799a..b3489d2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -43,7 +43,7 @@ fn crawl(argument: &Argument, output: &Output) -> Result<(), Box<dyn Error>> {
         .items()
         .iter()
     {
-        if argument.limit > 0 && total >= argument.limit {
+        if argument.limit.is_some_and(|limit| total >= limit) {
             break;
         }
 
@@ -108,7 +108,7 @@ fn crawl(argument: &Argument, output: &Output) -> Result<(), Box<dyn Error>> {
             let mut files: Vec<_> = read_dir(&path)?.filter_map(Result::ok).collect();
             files.sort_by_key(|f| f.file_name());
 
-            let mut data = Vec::with_capacity(argument.limit);
+            let mut data = Vec::with_capacity(argument.limit.unwrap_or_default());
             let mut index = File::create(&index_filename)?;
             let mut total = 0;