diff --git a/common/models/access-token.json b/common/models/access-token.json
index 9e3d4d46..bd726081 100644
--- a/common/models/access-token.json
+++ b/common/models/access-token.json
@@ -7,6 +7,7 @@
     },
     "ttl": {
       "type": "number",
+      "format": "double",
       "ttl": true,
       "default": 1209600,
       "description": "time to live in seconds (2 weeks by default)"