diff --git a/src/auth/serializer/src/operations.js b/src/auth/serializer/src/operations.js
index dda34f17ea9de05205385cbb36827a133fa59f68..335276ade43669215479a3a89248cee6170a410e 100644
--- a/src/auth/serializer/src/operations.js
+++ b/src/auth/serializer/src/operations.js
@@ -1,5 +1,4 @@
-
-// This file is merge updated from steemd's js_operation_serializer program.
+// This file is merge updated from hived's js_operation_serializer program.
 /*
 
 ./js_operation_serializer |
@@ -128,6 +127,11 @@ const smt_param_allow_downvotes = new Serializer(3, {
   value: bool
 });
 
+var update_proposal_end_date = new Serializer(1, {
+    end_date: time_point_sec
+});
+
+
 // Custom-types after Generated code
 
 // ##  Generated code follows
@@ -717,7 +721,7 @@ let update_proposal = new Serializer(
     daily_pay: asset,
     subject: string,
     permlink: string,
-    extensions: set(future_extensions)
+    extensions: set(static_variant([future_extensions, update_proposal_end_date]))
   }
 );