diff --git a/invite.py b/invite.py
index 92fac27..8033dcf 100644
--- a/invite.py
+++ b/invite.py
@@ -53,7 +53,12 @@ class Invite(Plugin):
 
         ex_date = datetime.datetime.strftime( \
                 (datetime.date.today() + datetime.timedelta(days=self.config["expiration"])), \
-                "%m.%d.%Y")
+                "%Y.%m.%d")
+        # use re-ordered date if using legacy code
+        if self.config["legacy_mr"] == True:
+            ex_date = datetime.datetime.strftime( \
+                    (datetime.date.today() + datetime.timedelta(days=self.config["expiration"])), \
+                    "%m.%d.%Y")
         headers = {
             'Authorization': f"SharedSecret {self.config['admin_secret']}",
             'Content-Type': 'application/json'
@@ -61,7 +66,7 @@ class Invite(Plugin):
         
         try:
             response = await self.http.post(f"{self.config['api_url']}/token", headers=headers, \
-                        json={"one_time": True, "ex_date": ex_date})
+                    json={"max_usage": 1, "one_time": True, "ex_date": ex_date})
             resp_json = await response.json()
         except Exception as e:
             await evt.respond(f"request failed: {e.message}")