diff --git a/src/StaticPHP/Command/Dev/GenExtTestMatrixCommand.php b/src/StaticPHP/Command/Dev/GenExtTestMatrixCommand.php
index 8668ef76..a1743200 100644
--- a/src/StaticPHP/Command/Dev/GenExtTestMatrixCommand.php
+++ b/src/StaticPHP/Command/Dev/GenExtTestMatrixCommand.php
@@ -61,6 +61,7 @@ class GenExtTestMatrixCommand extends BaseCommand
         'imagick',
         'intl',
         'mongodb',
+        'gmssl',
     ];
 
     /**