diff --git a/src/lib/Browser/Context/BrowserContext.php b/src/lib/Browser/Context/BrowserContext.php
index 56da80c1..85352879 100644
--- a/src/lib/Browser/Context/BrowserContext.php
+++ b/src/lib/Browser/Context/BrowserContext.php
@@ -65,8 +65,7 @@ private function getHeaderValue($responseHeaders, $header): string
         if ($this->getSession()->getDriver() instanceof ChromeDriver) {
             return $responseHeaders[$header];
         }
-        var_dump($responseHeaders);
 
-        return $responseHeaders[$header][0];
+        return $responseHeaders[strtolower($header)][0];
     }
 }