diff --git a/CHANGES.rst b/CHANGES.rst
index 9eb5b2a5ae18874602378d709bcc66a8ff22ab0e..339fa275228b52fbf6af56fca7bbf7be4396a070 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -28,6 +28,11 @@ General
 Node
 ----
 
+- Bump RPCs ``POST ../helpers/parse/operations``, ``POST
+  ../helpers/scripts/run_operation`` and ``POST
+  ../helpers/scripts/simulate_operation`` default version to version ``1``.
+  Version ``0`` can still be used with ``?version=0`` argument. (MR :gl:`!9840`)
+
 Client
 ------
 
diff --git a/src/proto_alpha/lib_plugin/RPC.ml b/src/proto_alpha/lib_plugin/RPC.ml
index 938ed86ceed59de974af7c1feb6b86cb27ef7b27..f68aa41c113eb57c2be4dccc200dff871766c24f 100644
--- a/src/proto_alpha/lib_plugin/RPC.ml
+++ b/src/proto_alpha/lib_plugin/RPC.ml
@@ -39,7 +39,7 @@ let version_of_string = function
   | "1" -> Ok Version_1
   | _ -> Error "Cannot parse version (supported versions \"0\" and \"1\")"
 
-let default_operations_version = Version_0
+let default_operations_version = Version_1
 
 let version_arg =
   let open RPC_arg in