diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Revision history for pms-infra-serial
 
+## 0.0.3.0 -- 2025-08-17
+
+* Fixed proc-message.
+
 ## 0.0.2.0 -- 2025-07-20
 
 * Added proc tool.
diff --git a/pms-infra-serial.cabal b/pms-infra-serial.cabal
--- a/pms-infra-serial.cabal
+++ b/pms-infra-serial.cabal
@@ -20,7 +20,7 @@
 -- PVP summary:     +-+------- breaking API changes
 --                  | | +----- non-breaking API additions
 --                  | | | +--- code changes with no API change
-version:            0.0.2.0
+version:            0.0.3.0
 
 -- A short (one-line) description of the package.
 synopsis:           pms-infra-serial
diff --git a/src/PMS/Infra/Serial/DM/Type.hs b/src/PMS/Infra/Serial/DM/Type.hs
--- a/src/PMS/Infra/Serial/DM/Type.hs
+++ b/src/PMS/Infra/Serial/DM/Type.hs
@@ -20,7 +20,6 @@
 data AppData = AppData {
                _handleAppData :: STM.TMVar (Maybe Handle)
              , _lockAppData :: STM.TMVar ()
-             , _jsonrpcAppData :: DM.JsonRpcRequest
              }
 
 makeLenses ''AppData
@@ -32,7 +31,6 @@
   return AppData {
            _handleAppData = mgrVar
          , _lockAppData = lock
-         , _jsonrpcAppData = def
          }
 
 -- |