diff --git a/src/PhpDebugBarMiddleware.php b/src/PhpDebugBarMiddleware.php
index 7f580a5..6a1185c 100644
--- a/src/PhpDebugBarMiddleware.php
+++ b/src/PhpDebugBarMiddleware.php
@@ -25,11 +25,24 @@ class PhpDebugBarMiddleware implements MiddlewareInterface
 {
     use DoublePassCompatibilityTrait;
 
+    /**
+     * @var DebugBarRenderer
+     */
     protected $debugBarRenderer;
 
-    public function __construct(DebugBarRenderer $debugbarRenderer)
+    /**
+     * @var bool
+     */
+    protected $excludeNonHtmlContent;
+
+    /**
+     * @param DebugBarRenderer $debugbarRenderer
+     * @param bool $excludeNonHtmlContent Whether to disable debugbar on content-types != 'test/html'
+     */
+    public function __construct(DebugBarRenderer $debugbarRenderer, $excludeNonHtmlContent=false)
     {
         $this->debugBarRenderer = $debugbarRenderer;
+        $this->excludeNonHtmlContent = $excludeNonHtmlContent;
     }
 
     /**
@@ -49,7 +62,10 @@ public function process(ServerRequestInterface $request, DelegateInterface $dele
 
         if ($this->isHtmlResponse($response)) {
             return $this->attachDebugBarToResponse($response);
+        } elseif ($this->excludeNonHtmlContent) {
+            return $response;
         }
+
         return $this->prepareHtmlResponseWithDebugBar($response);
     }