diff --git a/README.md b/README.md
index 419c2c98..7aa390e0 100644
--- a/README.md
+++ b/README.md
@@ -20,17 +20,17 @@
 
 Download the latest release:
 
-- [Linux](https://github.com/Girbons/comics-downloader/releases/download/v0.21.0/comics-downloader)
-- [Mac OSX](https://github.com/Girbons/comics-downloader/releases/download/v0.21.0/comics-downloader-osx)
-- [Windows](https://github.com/Girbons/comics-downloader/releases/download/v0.21.0/comics-downloader.exe)
-- [Linux ARM](https://github.com/Girbons/comics-downloader/releases/download/v0.21.0/comics-downloader-linux-arm)
-- [Linux ARM64](https://github.com/Girbons/comics-downloader/releases/download/v0.21.0/comics-downloader-linux-arm64)
+- [Linux](https://github.com/Girbons/comics-downloader/releases/download/v0.21.1/comics-downloader)
+- [Mac OSX](https://github.com/Girbons/comics-downloader/releases/download/v0.21.1/comics-downloader-osx)
+- [Windows](https://github.com/Girbons/comics-downloader/releases/download/v0.21.1/comics-downloader.exe)
+- [Linux ARM](https://github.com/Girbons/comics-downloader/releases/download/v0.21.1/comics-downloader-linux-arm)
+- [Linux ARM64](https://github.com/Girbons/comics-downloader/releases/download/v0.21.1/comics-downloader-linux-arm64)
 
 Download the latest GUI release:
 
-- [Linux](https://github.com/Girbons/comics-downloader/releases/download/v0.21.0/comics-downloader-gui-linux-amd64)
-- [Mac OSX](https://github.com/Girbons/comics-downloader/releases/download/v0.21.0/comics-downloader-gui-osx)
-- [Windows](https://github.com/Girbons/comics-downloader/releases/download/v0.21.0/comics-downloader-gui-windows.exe)
+- [Linux](https://github.com/Girbons/comics-downloader/releases/download/v0.21.1/comics-downloader-gui-linux-amd64)
+- [Mac OSX](https://github.com/Girbons/comics-downloader/releases/download/v0.21.1/comics-downloader-gui-osx)
+- [Windows](https://github.com/Girbons/comics-downloader/releases/download/v0.21.1/comics-downloader-gui-windows.exe)
 
 Put the script under a folder.
 
diff --git a/internal/version/version.go b/internal/version/version.go
index 78b49b4d..0a5fb14e 100644
--- a/internal/version/version.go
+++ b/internal/version/version.go
@@ -2,4 +2,4 @@ package version
 
 // Tag specifies the current release tag.
 // It needs to be manually updated.
-const Tag = "v0.21.0"
+const Tag = "v0.21.1"
diff --git a/pkg/core/core.go b/pkg/core/core.go
index 884c43e6..75a0cd8d 100644
--- a/pkg/core/core.go
+++ b/pkg/core/core.go
@@ -7,6 +7,7 @@ import (
 	"net/http"
 	"os"
 	"strings"
+	"time"
 
 	"github.com/Girbons/comics-downloader/pkg/util"
 	epub "github.com/bmaupin/go-epub"
@@ -237,19 +238,21 @@ func (comic *Comic) DownloadImages(outputFolder string) (string, error) {
 		return dir, err
 	}
 
+	client := &http.Client{
+		Transport: &http.Transport{
+			MaxIdleConns:    11,
+			IdleConnTimeout: 30 * time.Second,
+		},
+	}
+
 	for i, link := range comic.Links {
 		if link != "" {
-			rsp, err := http.Get(link)
+			rsp, err := client.Get(link)
 			if err != nil {
 				return dir, err
 			}
 			defer rsp.Body.Close()
 
-			// retrieve the image from the response
-			if err != nil {
-				return dir, err
-			}
-
 			imgFile, err := os.Create(fmt.Sprintf("%04d-image.%s", i, format))
 			if err != nil {
 				return dir, err