diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 576d5895..ef872991 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -22,6 +22,8 @@ jobs:
         include:
           - php: '8.4'
             experimental: true
+          - php: '8.5'
+            experimental: true
 
     name: "PHP: ${{ matrix.php }}"
 
diff --git a/src/parts/fileparts/disk_file.php b/src/parts/fileparts/disk_file.php
index 70525923..8adb4fe7 100644
--- a/src/parts/fileparts/disk_file.php
+++ b/src/parts/fileparts/disk_file.php
@@ -67,7 +67,10 @@ public function __construct( $fileName, $contentType = null, $mimeType = null )
                 $this->contentType = self::CONTENT_TYPE_APPLICATION;
                 $this->mimeType = "octet-stream";
             }
-            finfo_close( $fileInfo );
+            if ( version_compare(PHP_VERSION, '8.5.0', '<') )
+            {
+                finfo_close( $fileInfo );
+            }
         }
         else
         {