diff --git a/.github/workflows/ci-cd.yaml b/.github/workflows/ci-cd.yaml
index d0ba89f..214caa1 100644
--- a/.github/workflows/ci-cd.yaml
+++ b/.github/workflows/ci-cd.yaml
@@ -16,7 +16,7 @@ jobs:
           "5.6",
           "7.4",
           "8.0",
-          "8.4",
+          "8.5",
         ]
         os: [ubuntu-latest, macOS-latest, windows-latest]
     steps:
diff --git a/lib/Tinify.php b/lib/Tinify.php
index 9e34876..80f533f 100644
--- a/lib/Tinify.php
+++ b/lib/Tinify.php
@@ -2,7 +2,7 @@
 
 namespace Tinify;
 
-const VERSION = "1.6.3";
+const VERSION = "1.6.4";
 
 class Tinify {
     private static $key = NULL;
diff --git a/lib/Tinify/Client.php b/lib/Tinify/Client.php
index 531b830..93bd513 100644
--- a/lib/Tinify/Client.php
+++ b/lib/Tinify/Client.php
@@ -112,7 +112,9 @@ function request($method, $url, $body = NULL) {
             if (is_string($response)) {
                 $status = curl_getinfo($request, CURLINFO_HTTP_CODE);
                 $headerSize = curl_getinfo($request, CURLINFO_HEADER_SIZE);
-                curl_close($request);
+                if (PHP_VERSION_ID < 80000) {
+                    curl_close($request);
+                }
 
                 $headers = self::parseHeaders(substr($response, 0, $headerSize));
                 $responseBody = substr($response, $headerSize);
@@ -140,7 +142,9 @@ function request($method, $url, $body = NULL) {
                 throw Exception::create($details->message, $details->error, $status);
             } else {
                 $message = sprintf("%s (#%d)", curl_error($request), curl_errno($request));
-                curl_close($request);
+                if (PHP_VERSION_ID < 80000) {
+                    curl_close($request);
+                }
                 if ($retries > 0) continue;
                 throw new ConnectionException("Error while connecting: " . $message);
             }
diff --git a/test/curl_mock.php b/test/curl_mock.php
index 9008924..8fe6a00 100644
--- a/test/curl_mock.php
+++ b/test/curl_mock.php
@@ -17,6 +17,7 @@ class CurlMock {
     private static $version = array();
 
     public $options = array();
+	public $request;
     public $response;
     public $closed = false;