diff --git a/src/services/book_library/mod.rs b/src/services/book_library/mod.rs
index aac6aa7..ca46d1e 100644
--- a/src/services/book_library/mod.rs
+++ b/src/services/book_library/mod.rs
@@ -1,9 +1,12 @@
 pub mod types;
 
+use once_cell::sync::Lazy;
 use serde::de::DeserializeOwned;
 
 use crate::config;
 
+pub static CLIENT: Lazy<reqwest::Client> = Lazy::new(reqwest::Client::new);
+
 async fn _make_request<T>(
     url: &str,
     params: Vec<(&str, String)>,
@@ -11,11 +14,9 @@ async fn _make_request<T>(
 where
     T: DeserializeOwned,
 {
-    let client = reqwest::Client::new();
-
     let formatted_url = format!("{}{}", &config::CONFIG.book_library_url, url);
 
-    let response = client
+    let response = CLIENT
         .get(formatted_url)
         .query(&params)
         .header("Authorization", &config::CONFIG.book_library_api_key)
diff --git a/src/services/downloader/mod.rs b/src/services/downloader/mod.rs
index 1a59ae1..3345d33 100644
--- a/src/services/downloader/mod.rs
+++ b/src/services/downloader/mod.rs
@@ -2,6 +2,7 @@ pub mod types;
 pub mod utils;
 pub mod zip;
 
+use once_cell::sync::Lazy;
 use reqwest::Response;
 use tokio::task::JoinSet;
 
@@ -15,6 +16,8 @@ use super::book_library::types::BookWithRemote;
 use super::covert::convert_file;
 use super::{book_library::get_remote_book, filename_getter::get_filename_by_book};
 
+pub static CLIENT: Lazy<reqwest::Client> = Lazy::new(reqwest::Client::new);
+
 pub async fn download<'a>(
     book_id: &'a u32,
     book_file_type: &'a str,
@@ -37,7 +40,7 @@ pub async fn download<'a>(
                 .build()
                 .unwrap()
         }
-        None => reqwest::Client::new(),
+        None => CLIENT.clone(),
     };
 
     let response = client.get(url).send().await;
diff --git a/src/services/downloader/utils.rs b/src/services/downloader/utils.rs
index 21d5964..1446266 100644
--- a/src/services/downloader/utils.rs
+++ b/src/services/downloader/utils.rs
@@ -25,7 +25,7 @@ pub async fn response_to_tempfile(res: &mut Response) -> Option<(SpooledTempFile
 
             data_size += data.len();
 
-            match tmp_file.write(data.chunk()) {
+            match tmp_file.write_all(data.chunk()) {
                 Ok(_) => (),
                 Err(_) => return None,
             }