diff --git a/.github/workflows/payplug-ci.yml b/.github/workflows/payplug-ci.yml
index 4e032a0..449dc27 100644
--- a/.github/workflows/payplug-ci.yml
+++ b/.github/workflows/payplug-ci.yml
@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ['7.3', '7.4', '8.0']
+        php-versions: ['7.3', '7.4', '8.0', '8.5']
         phpunit-versions: ['8.5.15']
         include:
         - php-versions: '5.6'
diff --git a/lib/Payplug/Core/CurlRequest.php b/lib/Payplug/Core/CurlRequest.php
index 0964829..ac300cb 100644
--- a/lib/Payplug/Core/CurlRequest.php
+++ b/lib/Payplug/Core/CurlRequest.php
@@ -49,7 +49,11 @@ public function exec()
      */
     public function close()
     {
-        curl_close($this->_curl);
+        // curl_close() is a no-op since PHP 8.0 and deprecated in PHP 8.5.
+        // Calling it under PHP 8.5 with developer mode throws (deprecations -> exceptions).
+        if (PHP_VERSION_ID < 80000) {
+            curl_close($this->_curl);
+        }
     }
 
     /**
diff --git a/rector.php b/rector.php
index f065141..3ec7782 100644
--- a/rector.php
+++ b/rector.php
@@ -9,7 +9,7 @@
     ->withPaths([
         __DIR__ . '/lib',
     ])
-    ->withPhpVersion(Rector\ValueObject\PhpVersion::PHP_84)
+    ->withPhpVersion(Rector\ValueObject\PhpVersion::PHP_85)
     ->withRules([
         ExplicitNullableParamTypeRector::class,
         CompleteDynamicPropertiesRector::class,