diff --git a/src/Manifest/ManifestManager/Options/OutTable/ManifestOptions.php b/src/Manifest/ManifestManager/Options/OutTable/ManifestOptions.php
index 80c3757..8b2708f 100644
--- a/src/Manifest/ManifestManager/Options/OutTable/ManifestOptions.php
+++ b/src/Manifest/ManifestManager/Options/OutTable/ManifestOptions.php
@@ -387,7 +387,7 @@ public function setDeleteWhereOperator(?string $deleteWhereOperator): ManifestOp
         return $this;
     }
 
-    public function setLegacyPrimaryKeys(array $primaryKey): ManifestOptions
+    public function setLegacyPrimaryKeys(?array $primaryKey): ManifestOptions
     {
         $this->legacyPrimaryKeys = $primaryKey;
         return $this;