diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 8758e88..895ad8c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -25,7 +25,7 @@ jobs:
         name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: "8.1"
+          php-version: "8.5"
           extensions: mbstring, zip
           tools: composer:2, php-cs-fixer:3
           coverage: none
@@ -43,7 +43,7 @@ jobs:
       matrix:
         php-version:
           - "5.3"
-          - "8.4"
+          - "8.5"
     steps:
       -
         name: Setup PHP
@@ -91,13 +91,14 @@ jobs:
           - "8.2"
           - "8.3"
           - "8.4"
+          - "8.5"
         include:
           - os: windows-latest
             php-version: "5.6"
           - os: windows-latest
             php-version: "7.4"
           - os: windows-latest
-            php-version: "8.4"
+            php-version: "8.5"
     runs-on: ${{ matrix.os }}
     steps:
       -
diff --git a/bin/import-cldr-data b/bin/import-cldr-data
index db6d2fa..990f5a8 100755
--- a/bin/import-cldr-data
+++ b/bin/import-cldr-data
@@ -173,14 +173,24 @@ class DocumentStorage
     private function fetch($path)
     {
         $url = $this->baseUrl . '/' . ltrim($path, '/');
+        if (defined('PHP_VERSION_ID') && \PHP_VERSION_ID >= 80400) {
+            http_clear_last_response_headers();
+        }
         set_error_handler(function () {}, -1);
         $content = file_get_contents($url, false, $this->context);
         restore_error_handler();
         if ($content === false) {
             $details = '';
-            /** @var array $http_response_header */
-            if (!empty($http_response_header)) {
-                $details = " - {$http_response_header[0]}";
+            if (defined('PHP_VERSION_ID') && \PHP_VERSION_ID >= 80400) {
+                $lastResponseHeaders = http_get_last_response_headers();
+            } elseif (!empty($http_response_header)) {
+                $varName = 'http_response_header';
+                $lastResponseHeaders = ${$varName};
+            } else {
+                $lastResponseHeaders = null;
+            }
+            if (!empty($lastResponseHeaders)) {
+                $details = " - {$lastResponseHeaders[0]}";
             }
             throw new RuntimeException("Failed to download from {$url}{$details}");
         }