diff --git a/mining/mining.go b/mining/mining.go
index 8d06d3d34..1771e0130 100644
--- a/mining/mining.go
+++ b/mining/mining.go
@@ -50,6 +50,12 @@ func createCoinbaseTx(accountManager *account.Manager, amount uint64, blockHeigh
 		return
 	}
 
+	byteData, err := txData.MarshalText()
+	if err != nil {
+		return
+	}
+	txData.SerializedSize = uint64(len(byteData))
+
 	tx = &types.Tx{
 		TxData: *txData,
 		Tx:     types.MapTx(txData),
diff --git a/version/version.go b/version/version.go
index 122c7c44e..ccb5ec9a7 100644
--- a/version/version.go
+++ b/version/version.go
@@ -2,7 +2,7 @@ package version
 
 var (
 	// The full version string
-	Version = "0.4.3"
+	Version = "0.4.4"
 	// GitCommit is set with --ldflags "-X main.gitCommit=$(git rev-parse HEAD)"
 	GitCommit string
 )