diff --git a/src/auth/serializer/src/operations.js b/src/auth/serializer/src/operations.js
index d09e2fcacd1527739b2a52367f4dbc8e11399863..6f6fbe9664d62b41fc4d261537aad9710f734806 100644
--- a/src/auth/serializer/src/operations.js
+++ b/src/auth/serializer/src/operations.js
@@ -713,7 +713,7 @@ let remove_proposal = new Serializer(
 let update_proposal = new Serializer(
   "update_proposal", {
     creator: string,
-    proposal_id: string,
+    proposal_id: uint64,
     daily_pay: asset,
     subject: string,
     permlink: string,