diff --git a/README.md b/README.md
index 2bb9ea6..302677b 100644
--- a/README.md
+++ b/README.md
@@ -47,6 +47,7 @@ It will download the last version of every file present on Wayback Machine to `.
 	    -p, --maximum-snapshot NUMBER    Maximum snapshot pages to consider (Default is 100)
 					     Count an average of 150,000 snapshots per page
 	    -l, --list                       Only list file urls in a JSON format with the archived timestamps, won't download anything
+	    -u, --user-agent STRING          UserAgent for connection (Default is Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0)
 	    
 ## Specify directory to save files to
 
@@ -175,6 +176,16 @@ Example:
 
     wayback_machine_downloader http://example.com --concurrency 20
 
+## Specify UserAgent for connection
+
+     -u, --user-agent STRING
+
+UserAgent for connection (Default is Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0)
+
+Example:
+
+    wayback_machine_downloader http://example.com --user-agent "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36"
+
 ## Using the Docker image
 
 As an alternative installation way, we have a Docker image! Retrieve the wayback-machine-downloader Docker image this way:
diff --git a/bin/wayback_machine_downloader b/bin/wayback_machine_downloader
index 8b9f2fd..e1e53a4 100755
--- a/bin/wayback_machine_downloader
+++ b/bin/wayback_machine_downloader
@@ -58,6 +58,10 @@ option_parser = OptionParser.new do |opts|
     options[:list] = true
   end
 
+  opts.on("-u", "--user-agent STRING", String, "UserAgent for connection (Default is Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0)") do |t|
+    options[:user_agent] = t
+  end
+
   opts.on("-v", "--version", "Display version") do |t|
     options[:version] = t
   end
diff --git a/lib/wayback_machine_downloader.rb b/lib/wayback_machine_downloader.rb
index 04005c8..226a90f 100644
--- a/lib/wayback_machine_downloader.rb
+++ b/lib/wayback_machine_downloader.rb
@@ -18,7 +18,7 @@ class WaybackMachineDownloader
 
   attr_accessor :base_url, :exact_url, :directory, :all_timestamps,
     :from_timestamp, :to_timestamp, :only_filter, :exclude_filter, 
-    :all, :maximum_pages, :threads_count
+    :all, :maximum_pages, :threads_count, :user_agent
 
   def initialize params
     @base_url = params[:base_url]
@@ -32,6 +32,7 @@ def initialize params
     @all = params[:all]
     @maximum_pages = params[:maximum_pages] ? params[:maximum_pages].to_i : 100
     @threads_count = params[:threads_count].to_i
+    @user_agent = params[:user_agent] ? params[:user_agent] : "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0) Gecko/20100101 Firefox/80.0"
   end
 
   def backup_name
@@ -268,7 +269,7 @@ def download_file file_remote_info
         structure_dir_path dir_path
         open(file_path, "wb") do |file|
           begin
-            URI.open("https://web.archive.org/web/#{file_timestamp}id_/#{file_url}", "Accept-Encoding" => "plain") do |uri|
+            open("https://web.archive.org/web/#{file_timestamp}id_/#{file_url}", "Accept-Encoding" => "plain", "User-Agent" => @user_agent) do |uri|
               file.write(uri.read)
             end
           rescue OpenURI::HTTPError => e
diff --git a/lib/wayback_machine_downloader/archive_api.rb b/lib/wayback_machine_downloader/archive_api.rb
index 903f42b..e641d44 100644
--- a/lib/wayback_machine_downloader/archive_api.rb
+++ b/lib/wayback_machine_downloader/archive_api.rb
@@ -5,7 +5,7 @@ def get_raw_list_from_api url, page_index
     request_url += url
     request_url += parameters_for_api page_index
 
-    URI.open(request_url).read
+    open(request_url, "User-Agent" => @user_agent).read
   end
 
   def parameters_for_api page_index