diff --git a/src/Infrastructure/IFSC/IFSCApiClientAuthenticator.php b/src/Infrastructure/IFSC/IFSCApiClientAuthenticator.php
index 0ed16d4..350dc47 100644
--- a/src/Infrastructure/IFSC/IFSCApiClientAuthenticator.php
+++ b/src/Infrastructure/IFSC/IFSCApiClientAuthenticator.php
@@ -45,6 +45,7 @@ public function fetchSessionId(): string
     private function getCookies(): array
     {
         $headers = $this->httpClient->getHeaders(self::IFSC_RESULTS_INFO_PAGE);
+        $headers = array_change_key_case($headers);
 
         return $headers['set-cookie'] ?? [];
     }