diff --git a/src/Action/CreateFinalConfigurationData.php b/src/Action/CreateFinalConfigurationData.php
index b656df0..7ab85a0 100644
--- a/src/Action/CreateFinalConfigurationData.php
+++ b/src/Action/CreateFinalConfigurationData.php
@@ -39,6 +39,7 @@ public function handle(string $configFile, \Closure $next) {
 
         $phpExtensions = [
             'gd',
+            'opcache',
             // TODO: only add `pdo_mysql` if its used.
             'pdo_mysql',
             'zip',