diff --git a/doc/repo/assets.md b/doc/repo/assets.md
index 3df3eae2b72..93234929074 100644
--- a/doc/repo/assets.md
+++ b/doc/repo/assets.md
@@ -13,6 +13,12 @@ $assets = $client->api('repo')->releases()->assets()->all('twbs', 'bootstrap', $
 $asset = $client->api('repo')->releases()->assets()->show('twbs', 'bootstrap', $assetId);
 ```
 
+### Download binary content of asset
+
+```php
+$asset = $client->api('repo')->releases()->assets()->show('twbs', 'bootstrap', $assetId, true);
+```
+
 ### Create an asset
 
 ```php
diff --git a/lib/Github/Api/Repository/Assets.php b/lib/Github/Api/Repository/Assets.php
index 39cdc5da913..043016e7801 100644
--- a/lib/Github/Api/Repository/Assets.php
+++ b/lib/Github/Api/Repository/Assets.php
@@ -3,6 +3,7 @@
 namespace Github\Api\Repository;
 
 use Github\Api\AbstractApi;
+use Github\Api\AcceptHeaderTrait;
 use Github\Exception\ErrorException;
 use Github\Exception\MissingArgumentException;
 
@@ -13,6 +14,8 @@
  */
 class Assets extends AbstractApi
 {
+    use AcceptHeaderTrait;
+
     /**
      * Get all release's assets in selected repository
      * GET /repos/:owner/:repo/releases/:id/assets.
@@ -36,10 +39,14 @@ public function all($username, $repository, $id)
      * @param string $repository the name of the repo
      * @param int    $id         the id of the asset
      *
-     * @return array
+     * @return array|string
      */
-    public function show($username, $repository, $id)
+    public function show($username, $repository, $id, bool $returnBinaryContent = false)
     {
+        if ($returnBinaryContent) {
+            $this->acceptHeaderValue = 'application/octet-stream';
+        }
+
         return $this->get('/repos/'.rawurlencode($username).'/'.rawurlencode($repository).'/releases/assets/'.$id);
     }
 
diff --git a/lib/Github/Client.php b/lib/Github/Client.php
index 1a101a34a8f..6ea5072ab7f 100644
--- a/lib/Github/Client.php
+++ b/lib/Github/Client.php
@@ -119,6 +119,7 @@ public function __construct(Builder $httpClientBuilder = null, $apiVersion = nul
     {
         $this->responseHistory = new History();
         $this->httpClientBuilder = $builder = $httpClientBuilder ?? new Builder();
+        $this->apiVersion = $apiVersion ?: 'v3';
 
         $builder->addPlugin(new GithubExceptionThrower());
         $builder->addPlugin(new Plugin\HistoryPlugin($this->responseHistory));
@@ -126,11 +127,9 @@ public function __construct(Builder $httpClientBuilder = null, $apiVersion = nul
         $builder->addPlugin(new Plugin\AddHostPlugin(Psr17FactoryDiscovery::findUriFactory()->createUri('https://api.github.com')));
         $builder->addPlugin(new Plugin\HeaderDefaultsPlugin([
             'User-Agent' => 'php-github-api (http://github.com/KnpLabs/php-github-api)',
+            'Accept' => sprintf('application/vnd.github.%s+json', $this->apiVersion),
         ]));
 
-        $this->apiVersion = $apiVersion ?: 'v3';
-        $builder->addHeaderValue('Accept', sprintf('application/vnd.github.%s+json', $this->apiVersion));
-
         if ($enterpriseUrl) {
             $this->setEnterpriseUrl($enterpriseUrl);
         }