diff --git a/bdchain/api/ac_chain.proto b/bdchain/api/ac_chain.proto
index 0777eee..2afe701 100644
--- a/bdchain/api/ac_chain.proto
+++ b/bdchain/api/ac_chain.proto
@@ -5,7 +5,7 @@ package bdchain.api;
 import "bdchain/api/common.proto";
 
 option go_package = "bdchain/api/ac_chain";
-option java_package = "bdchain.api";
+option java_package = "bdchain.api.proto";
 option java_outer_classname = "AccountingChainProto";
 option java_multiple_files = true;
 
diff --git a/bdchain/api/common.proto b/bdchain/api/common.proto
index 64ad1e3..c2b22d2 100644
--- a/bdchain/api/common.proto
+++ b/bdchain/api/common.proto
@@ -3,7 +3,7 @@ syntax = "proto3";
 package bdchain.api;
 
 option go_package = "bdchain/api/common";
-option java_package = "bdchain.api";
+option java_package = "bdchain.api.proto";
 option java_outer_classname = "CommonProto";
 option java_multiple_files = true;
 
diff --git a/bdchain/api/tx_ledger.proto b/bdchain/api/tx_ledger.proto
index b9cbc15..d66f7c0 100644
--- a/bdchain/api/tx_ledger.proto
+++ b/bdchain/api/tx_ledger.proto
@@ -6,7 +6,7 @@ import "google/protobuf/empty.proto";
 import "bdchain/api/common.proto";
 
 option go_package = "bdchain/api/tx_ledger";
-option java_package = "bdchain.api";
+option java_package = "bdchain.api.proto";
 option java_outer_classname = "TransactionLedgerProto";
 option java_multiple_files = true;