diff --git a/oma-fetch/examples/downloads.rs b/oma-fetch/examples/downloads.rs
index 6dcf17b7..b69785ad 100644
--- a/oma-fetch/examples/downloads.rs
+++ b/oma-fetch/examples/downloads.rs
@@ -10,6 +10,7 @@ use oma_fetch::{
     DownloadEntryBuilder, DownloadEvent, DownloadResult, DownloadSource, DownloadSourceType,
     OmaFetcher,
 };
+use reqwest::ClientBuilder;
 use tokio::io::AsyncWriteExt;
 
 #[tokio::main]
@@ -50,7 +51,9 @@ async fn main() -> DownloadResult<()> {
     //     .dir(PathBuf::from("./oma-fetcher-test"))
     //     .build()?;
 
-    let fetcher = OmaFetcher::new(None, vec![file_1, file_2], None)?;
+    let client = ClientBuilder::new().user_agent("oma").build().unwrap();
+
+    let fetcher = OmaFetcher::new(&client, vec![file_1, file_2], None)?;
 
     tokio::fs::create_dir_all("./oma-fetcher-test")
         .await
diff --git a/oma-fetch/src/lib.rs b/oma-fetch/src/lib.rs
index ce8f65a3..b8bf9fb7 100644
--- a/oma-fetch/src/lib.rs
+++ b/oma-fetch/src/lib.rs
@@ -8,7 +8,7 @@ use derive_builder::Builder;
 use download::SingleDownloaderBuilder;
 use futures::StreamExt;
 
-use reqwest::{Client, ClientBuilder};
+use reqwest::Client;
 
 pub mod checksum;
 mod download;
@@ -90,8 +90,8 @@ impl Ord for DownloadSourceType {
     }
 }
 
-pub struct OmaFetcher {
-    client: Client,
+pub struct OmaFetcher<'a> {
+    client: &'a Client,
     download_list: Vec<DownloadEntry>,
     limit_thread: usize,
     retry_times: usize,
@@ -145,21 +145,14 @@ impl Summary {
 }
 
 /// OmaFetcher is a Download Manager
-impl OmaFetcher {
+impl<'a> OmaFetcher<'a> {
     pub fn new(
-        client: Option<Client>,
+        client: &'a Client,
         download_list: Vec<DownloadEntry>,
         limit_thread: Option<usize>,
-    ) -> DownloadResult<Self> {
-        let client = client.unwrap_or(
-            ClientBuilder::new()
-                .user_agent("oma")
-                .build()
-                .map_err(DownloadError::ReqwestError)?,
-        );
-
+    ) -> DownloadResult<OmaFetcher<'a>> {
         Ok(Self {
-            client,
+            client: &client,
             download_list,
             limit_thread: limit_thread.unwrap_or(4),
             retry_times: 3,
diff --git a/oma-pm/src/apt.rs b/oma-pm/src/apt.rs
index 388bc509..85e451f1 100644
--- a/oma-pm/src/apt.rs
+++ b/oma-pm/src/apt.rs
@@ -25,8 +25,8 @@ use oma_apt::{
 };
 use oma_console::console::{self, style};
 use oma_fetch::{
-    DownloadEntryBuilder, DownloadEntryBuilderError, DownloadError, DownloadEvent, DownloadSource,
-    DownloadSourceType, OmaFetcher, Summary,
+    reqwest::ClientBuilder, DownloadEntryBuilder, DownloadEntryBuilderError, DownloadError,
+    DownloadEvent, DownloadSource, DownloadSourceType, OmaFetcher, Summary,
 };
 use oma_utils::{
     dpkg::{is_hold, DpkgError},
@@ -718,7 +718,9 @@ impl OmaApt {
             download_list.push(download_entry);
         }
 
-        let downloader = OmaFetcher::new(None, download_list, network_thread)?;
+        let client = ClientBuilder::new().user_agent("oma").build().unwrap();
+
+        let downloader = OmaFetcher::new(&client, download_list, network_thread)?;
 
         let res = downloader
             .start_download(|count, event| callback(count, event, Some(total_size)))
diff --git a/oma-refresh/src/db.rs b/oma-refresh/src/db.rs
index 21e9c6c3..1e9cb16f 100644
--- a/oma-refresh/src/db.rs
+++ b/oma-refresh/src/db.rs
@@ -8,7 +8,7 @@ use futures::{future::join, FutureExt, StreamExt};
 use oma_apt_sources_lists::{SourceEntry, SourceError};
 use oma_fetch::{
     checksum::ChecksumError,
-    reqwest::{self, ClientBuilder},
+    reqwest::{self, Client, ClientBuilder},
     DownloadEntry, DownloadEntryBuilder, DownloadEntryBuilderError, DownloadEvent, DownloadResult,
     DownloadSource, DownloadSourceType, OmaFetcher, Summary,
 };
@@ -241,12 +241,12 @@ impl OmaRefresh {
         let client = ClientBuilder::new().user_agent("oma").build()?;
 
         let is_inrelease_map = self
-            .is_inrelease_map(&sourcelist, client, &m, &callback)
+            .get_is_inrelease_map(&sourcelist, &client, &m, &callback)
             .await?;
 
         let tasks = self.collect_download_release_tasks(&sourcelist, &m, is_inrelease_map)?;
 
-        let release_results = OmaFetcher::new(None, tasks, Some(self.limit))?
+        let release_results = OmaFetcher::new(&client, tasks, Some(self.limit))?
             .start_download(|c, event| callback(c, RefreshEvent::from(event), None))
             .await;
 
@@ -258,7 +258,7 @@ impl OmaRefresh {
             .collect_all_release_entry(all_inrelease, &sourcelist, &m)
             .await?;
 
-        let res = OmaFetcher::new(None, tasks, Some(self.limit))?
+        let res = OmaFetcher::new(&client, tasks, Some(self.limit))?
             .start_download(|count, event| callback(count, RefreshEvent::from(event), Some(total)))
             .await;
 
@@ -267,10 +267,10 @@ impl OmaRefresh {
         Ok(())
     }
 
-    async fn is_inrelease_map<F>(
+    async fn get_is_inrelease_map<F>(
         &self,
         sourcelist: &[OmaSourceEntry],
-        client: reqwest::Client,
+        client: &Client,
         m: &Option<HashMap<String, MirrorMapItem>>,
         callback: &F,
     ) -> Result<HashMap<usize, bool>>