diff --git a/README.md b/README.md
new file mode 100644
index 0000000..15a203b
--- /dev/null
+++ b/README.md
@@ -0,0 +1,10 @@
+usage:
+
+```console
+cargo build --release
+./target/release/lonefire https://www.pixiv.net/artworks/111503285
+```
+
+or, install from AUR
+[https://aur.archlinux.org/packages/lonefire](https://aur.archlinux.org/packages/lonefire)
+
diff --git a/src/downloader.rs b/src/downloader.rs
index d1ae7b9..dd5a7e4 100644
--- a/src/downloader.rs
+++ b/src/downloader.rs
@@ -1,7 +1,9 @@
 use anyhow::{Context, Result, anyhow};
-use config::PixivResponse;
+use config::{MAX_CONCURRENT_DOWNLOADS, PixivResponse};
 use futures::stream::{self, StreamExt};
-use helpers::{format_filename, generate_image_urls, normalize_image_url, set_headers};
+use helpers::{
+    filter_valid_urls, format_filename, generate_image_urls, normalize_image_url, set_headers,
+};
 use indicatif::{MultiProgress, ProgressBar, ProgressStyle};
 use reqwest::{
     Client,
@@ -15,10 +17,7 @@ use std::{
 };
 use url::Url;
 
-use crate::{
-    config::{self, MAX_CONCURRENT_DOWNLOADS},
-    helpers,
-};
+use crate::{config, helpers};
 
 pub async fn download_pixiv_artwork(artwork_url: &str) -> Result<()> {
     let client = Client::new();
@@ -59,11 +58,11 @@ pub async fn download_pixiv_artwork(artwork_url: &str) -> Result<()> {
 
     let page_count = illust_data.page_count as usize;
     let image_urls: Vec<String> = match &illust_data.urls.original {
-        Some(original_url) if original_url.contains(&artwork_id) => {
-            generate_image_urls(original_url, page_count)
-        }
+        Some(original_url) if original_url.contains(&artwork_id) => (0..page_count)
+            .map(|seq| original_url.replace("p0", &format!("p{}", seq)))
+            .collect(),
         _ => {
-            illust_data
+            let urls = illust_data
                 .user_illusts
                 .as_ref()
                 .map(|user_illusts| {
@@ -75,7 +74,9 @@ pub async fn download_pixiv_artwork(artwork_url: &str) -> Result<()> {
                         .flat_map(|normalized_url| generate_image_urls(&normalized_url, page_count))
                         .collect::<Vec<String>>()
                 })
-                .unwrap_or_default()
+                .unwrap_or_default();
+
+            filter_valid_urls(urls).await
         }
     };
     if image_urls.is_empty() {
@@ -84,10 +85,10 @@ pub async fn download_pixiv_artwork(artwork_url: &str) -> Result<()> {
 
     let m = MultiProgress::new();
     let sty = ProgressStyle::with_template(
-        "[{elapsed_precise}] {bar:40.cyan/blue} {pos:>7}/{len:7} {msg}",
+        "{spinner:.green}[{percent}%][{wide_bar:.cyan/blue}] {bytes}/{total_bytes} {msg}",
     )
     .unwrap()
-    .progress_chars("##-");
+    .progress_chars("#>-");
 
     stream::iter(image_urls.into_iter().map(|url| {
         let client = client.clone();
@@ -113,7 +114,7 @@ async fn download_image(client: Client, url: &str, dir: &Path, pb: &ProgressBar)
     let filepath = dir.join(&filename);
     let temp_path = filepath.with_extension("part");
     if filepath.exists() {
-        pb.finish_with_message("Already exists");
+        pb.finish_with_message(format!("{filename} already exists"));
         return Ok(());
     }
     let existing_size = temp_path.metadata().map(|s| s.len()).unwrap_or(0);
@@ -156,7 +157,7 @@ async fn download_image(client: Client, url: &str, dir: &Path, pb: &ProgressBar)
         pb.inc(chunk.len() as u64);
     }
 
-    pb.finish_with_message("Download completed.");
+    pb.finish_with_message(format!("{filename} 🗹"));
     rename(temp_path, filepath)?;
     Ok(())
 }
diff --git a/src/helpers.rs b/src/helpers.rs
index d36de70..fc5c6a2 100644
--- a/src/helpers.rs
+++ b/src/helpers.rs
@@ -1,8 +1,11 @@
+use futures::{StreamExt, stream};
 use regex::Regex;
 use reqwest::header::{
     ACCEPT, ACCEPT_LANGUAGE, CONNECTION, HeaderMap, HeaderValue, REFERER, USER_AGENT,
 };
 
+use crate::config::MAX_CONCURRENT_DOWNLOADS;
+
 pub fn normalize_image_url(base_url: &str) -> String {
     let re_custom_thumb = Regex::new(r"/c/250x250_80_a2/custom-thumb").unwrap();
     let re_img_master = Regex::new(r"/c/250x250_80_a2/img-master").unwrap();
@@ -29,6 +32,23 @@ pub fn generate_image_urls(base_url: &str, page_count: usize) -> Vec<String> {
         .collect()
 }
 
+async fn probe_image_url(url: String) -> Option<String> {
+    let probe_client = reqwest::Client::new();
+    let headers = set_headers();
+    match probe_client.head(&url).headers(headers).send().await {
+        Ok(response) if response.status().is_success() => Some(url),
+        _ => None,
+    }
+}
+
+pub async fn filter_valid_urls(urls: Vec<String>) -> Vec<String> {
+    stream::iter(urls.into_iter().map(probe_image_url))
+        .buffer_unordered(MAX_CONCURRENT_DOWNLOADS)
+        .filter_map(|url| async { url })
+        .collect::<Vec<String>>()
+        .await
+}
+
 pub fn format_filename(url: &str) -> Option<String> {
     let re = Regex::new(r"/(\d+)_p(\d+)(\.\w+)$").unwrap();
     if let Some(caps) = re.captures(url) {
diff --git a/src/main.rs b/src/main.rs
index 3b3c902..385f245 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -9,7 +9,7 @@ mod helpers;
 async fn main() -> Result<()> {
     let args: Vec<String> = std::env::args().collect();
     if args.len() < 2 {
-        eprintln!("Usage: pixiv_download <URL>");
+        eprintln!("Usage: lonefire <URL>\nBTW, lonefire can't download GIF image");
         std::process::exit(1);
     }
     let artwork_url = &args[1];