diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2f758f9..f86449e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -32,6 +32,8 @@ jobs:
           - "8.1"
           - "8.2"
           - "8.3"
+          - "8.4"
+          - "8.5"
         operating-system: [ubuntu-latest, windows-latest]
 
     steps:
@@ -46,7 +48,7 @@ jobs:
           extensions: "mbstring, gd, bcmath, bz2"
           tools: composer:v2
           ini-values: error_reporting=-1
-
+      
       - name: "Install dependencies"
         run: "composer install --no-interaction --no-progress"
 
diff --git a/composer.json b/composer.json
index 4e372da..fb4a16f 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
 
 	"require-dev": {
 		"yoast/phpunit-polyfills": "^1.0",
-		"mockery/mockery": "^0.9.5",
+		"mockery/mockery": "^0.9.5 || ^1.0",
 		"squizlabs/php_codesniffer": "^3.4",
 		"tracy/tracy": "^2.5"
 	},
diff --git a/src/Output/Png.php b/src/Output/Png.php
index 5cdaebd..1ea004f 100644
--- a/src/Output/Png.php
+++ b/src/Output/Png.php
@@ -57,7 +57,10 @@ public function output(QrCode $qrCode, $w = 100, $background = [255, 255, 255],
 		$data = ob_get_contents();
 		ob_end_clean();
 
-		imagedestroy($im);
+		//This function has been DEPRECATED as of PHP 8.5.0
+		if (PHP_VERSION_ID < 80500) {
+			imagedestroy($im);
+		}
 
 		return $data;
 	}