diff --git a/projects/plugins/jetpack/_inc/lib/tonesque.php b/projects/plugins/jetpack/_inc/lib/tonesque.php
index 1c974b20a8522..b674c260aa24d 100644
--- a/projects/plugins/jetpack/_inc/lib/tonesque.php
+++ b/projects/plugins/jetpack/_inc/lib/tonesque.php
@@ -86,7 +86,10 @@ public static function imagecreatefromurl( $image_url ) {
 
 			if ( empty( $data ) ) {
 				$response = wp_safe_remote_get( $image_url );
-				if ( is_wp_error( $response ) ) {
+				if ( 
+					is_wp_error( $response )
+					|| ! wp_startswith( $response['headers']['content-type'], 'image/' )
+				) {
 					return false;
 				}
 				$data = wp_remote_retrieve_body( $response );
@@ -103,6 +106,10 @@ public static function imagecreatefromurl( $image_url ) {
 			}
 		}
 
+		if ( null === $data ) {
+			return false;
+		}
+
 		// Now turn it into an image and return it.
 		return imagecreatefromstring( $data );
 	}