diff --git a/tasks/init.json b/tasks/init.json
index b8ba32d..0e4a4ac 100644
--- a/tasks/init.json
+++ b/tasks/init.json
@@ -10,9 +10,8 @@
       "description": "Parameters to give to the plan"
     },
     "arguments": {
-      "type": "Hash",
-      "description": "Hash of Bolt arguments to pass, e.g.: {modulepath=>/expl/path, ssl-verify=>false}",
-      "default": { }
+      "type": "Optional[Hash]",
+      "description": "Hash of Bolt arguments to pass, e.g.: {modulepath=>/expl/path, ssl-verify=>false}"
     },
     "debug": {
       "type": "Optional[Boolean]",