diff --git a/src/Svg/Document.php b/src/Svg/Document.php
index 24c0681..9db2b78 100644
--- a/src/Svg/Document.php
+++ b/src/Svg/Document.php
@@ -161,7 +161,9 @@ function ($parser, $name) {}
         }
         xml_parse($parser, "", true);
 
-        xml_parser_free($parser);
+        if (PHP_MAJOR_VERSION < 8) {
+            xml_parser_free($parser);
+        }
 
         return $this->handleSizeAttributes($rootAttributes);
     }
@@ -257,7 +259,9 @@ public function render(SurfaceInterface $surface)
 
         xml_parse($parser, "", true);
 
-        xml_parser_free($parser);
+        if (PHP_MAJOR_VERSION < 8) {
+            xml_parser_free($parser);
+        }
     }
 
     protected function svgOffset($attributes)
diff --git a/src/Svg/Surface/CPdf.php b/src/Svg/Surface/CPdf.php
index ce807a2..53732c4 100644
--- a/src/Svg/Surface/CPdf.php
+++ b/src/Svg/Surface/CPdf.php
@@ -5612,7 +5612,9 @@ protected function addImagePngAlpha($file, $x, $y, $w, $h, $byte)
             // Cast to 8bit+palette
             $imgalpha_ = @imagecreatefrompng($tempfile_alpha);
             imagecopy($imgalpha, $imgalpha_, 0, 0, 0, 0, $wpx, $hpx);
-            imagedestroy($imgalpha_);
+            if (PHP_MAJOR_VERSION < 8) {
+                imagedestroy($imgalpha_);
+            }
             imagepng($imgalpha, $tempfile_alpha);
 
             // Make opaque image
@@ -5658,7 +5660,9 @@ protected function addImagePngAlpha($file, $x, $y, $w, $h, $byte)
                 // Cast to 8bit+palette
                 $imgalpha_ = @imagecreatefrompng($tempfile_alpha);
                 imagecopy($imgalpha, $imgalpha_, 0, 0, 0, 0, $wpx, $hpx);
-                imagedestroy($imgalpha_);
+                if (PHP_MAJOR_VERSION < 8) {
+                    imagedestroy($imgalpha_);
+                }
                 imagepng($imgalpha, $tempfile_alpha);
             } else {
                 $tempfile_alpha = null;
@@ -5711,7 +5715,9 @@ protected function addImagePngAlpha($file, $x, $y, $w, $h, $byte)
             // extract image without alpha channel
             $imgplain = imagecreatetruecolor($wpx, $hpx);
             imagecopy($imgplain, $img, 0, 0, 0, 0, $wpx, $hpx);
-            imagedestroy($img);
+            if (PHP_MAJOR_VERSION < 8) {
+                imagedestroy($img);
+            }
 
             imagepng($imgalpha, $tempfile_alpha);
             imagepng($imgplain, $tempfile_plain);
@@ -5722,13 +5728,17 @@ protected function addImagePngAlpha($file, $x, $y, $w, $h, $byte)
         // embed mask image
         if ($tempfile_alpha) {
             $this->addImagePng($imgalpha, $tempfile_alpha, $x, $y, $w, $h, true);
-            imagedestroy($imgalpha);
+            if (PHP_MAJOR_VERSION < 8) {
+                imagedestroy($imgalpha);
+            }
             $this->imageCache[] = $tempfile_alpha;
         }
 
         // embed image, masked with previously embedded mask
         $this->addImagePng($imgplain, $tempfile_plain, $x, $y, $w, $h, false, ($tempfile_alpha !== null));
-        imagedestroy($imgplain);
+        if (PHP_MAJOR_VERSION < 8) {
+            imagedestroy($imgplain);
+        }
         $this->imageCache[] = $tempfile_plain;
     }
 
@@ -5813,11 +5823,13 @@ function addPngFromFile($file, $x, $y, $w = 0, $h = 0)
             }
 
             imagecopy($img, $imgtmp, 0, 0, 0, 0, $sx, $sy);
-            imagedestroy($imgtmp);
+            if (PHP_MAJOR_VERSION < 8) {
+                imagedestroy($imgtmp);
+            }
         }
         $this->addImagePng($img, $file, $x, $y, $w, $h);
 
-        if ($img) {
+        if ($img && PHP_MAJOR_VERSION < 8) {
             imagedestroy($img);
         }
     }