diff --git a/conf/type/__package_rubygem/parameter/optional b/conf/type/__package_rubygem/parameter/optional
index a52167d3..f121bdbf 100644
--- a/conf/type/__package_rubygem/parameter/optional
+++ b/conf/type/__package_rubygem/parameter/optional
@@ -1,2 +1 @@
 name
-version