diff --git a/wp-includes/class-wp-image-editor-imagick.php b/wp-includes/class-wp-image-editor-imagick.php
index 45a119c9c9..c014696b38 100644
--- a/wp-includes/class-wp-image-editor-imagick.php
+++ b/wp-includes/class-wp-image-editor-imagick.php
@@ -787,6 +787,10 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
 			// We want the thumbnail to be readable, so increase the rendering DPI.
 			$this->image->setResolution( 128, 128 );
 
+			// When generating thumbnails from cropped PDF pages, Imagemagick uses the uncropped
+			// area (resulting in unnecessary whitespace) unless the following option is set.
+			$this->image->setOption( 'pdf:use-cropbox', true );
+
 			// Only load the first page.
 			return $this->file . '[0]';
 		} catch ( Exception $e ) {
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 5a9a33bd7c..a21280c44a 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3-alpha-46237';
+$wp_version = '5.3-alpha-46238';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.