diff --git a/transactions.proto b/transactions.proto
index 1003747..0d2ad55 100644
--- a/transactions.proto
+++ b/transactions.proto
@@ -27,7 +27,7 @@ message TransactionCreate {
 message TransactionUpdate {
   string ID = 1;
   optional int64 Value = 2;
-  optional int64 StateID = 3;
+  optional int32 StateID = 3;
   optional google.protobuf.Struct Data = 4;
 }