diff --git a/app_async/src/main.rs b/app_async/src/main.rs
index b3e273e..00f4980 100644
--- a/app_async/src/main.rs
+++ b/app_async/src/main.rs
@@ -160,7 +160,7 @@ async fn read_from_db(id: u32) -> Option<Question> {
 
     match reader.get(index).await {
         Ok(question) => Some(question),
-        Err(_) => None
+        Err(_) => None,
     }
 }
 async fn write_db() {
@@ -168,7 +168,8 @@ async fn write_db() {
     tokio::try_join!(
         tokio::spawn(zip_reader_task(tx)),
         tokio::spawn(db_writer_task(rx))
-    ).expect("tokio join");
+    )
+    .expect("tokio join");
     println!("all done");
 }
 async fn db_writer_task(rx: UnboundedReceiver<Question>) {
diff --git a/lib/src/async_db.rs b/lib/src/async_db.rs
index 181244e..e363814 100644
--- a/lib/src/async_db.rs
+++ b/lib/src/async_db.rs
@@ -59,7 +59,7 @@ where
         let out = fs::File::create(path).await.str_err()?;
         let out = io::BufWriter::with_capacity(opts.out_buf_size, out);
         let data_buf: Vec<u8> = Vec::with_capacity(opts.data_buf_size);
-        
+
         let compress_lvl = opts.compress_lvl;
 
         let table: Vec<LSize> = vec![];
@@ -79,8 +79,10 @@ where
         let item_data = bincode::encode_to_vec(item, BINCODE_CFG).str_err()?;
 
         let mut zencoder = ZstdEncoder::with_quality(&item_data[..], self.compress_lvl);
-        io::copy(&mut zencoder, &mut self.data_buf).await.str_err()?;
-        
+        io::copy(&mut zencoder, &mut self.data_buf)
+            .await
+            .str_err()?;
+
         self.table.push(pos);
 
         Ok(())