diff --git a/CMakeLists.txt b/CMakeLists.txt
index ce57277..6ee47eb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,7 +36,7 @@ HunterGate(
     FILEPATH "${BCOS_UTILITIES_CMAKE_DIR}/config.cmake"
 )
 project(bcos-utilities VERSION "1.0.0")
-set(VERSION_SUFFIX "-rc1")
+set(VERSION_SUFFIX "-rc2")
 
 # basic settings
 include(Options)
diff --git a/bcos-utilities/Exceptions.h b/bcos-utilities/Exceptions.h
index f80955e..d8317bf 100644
--- a/bcos-utilities/Exceptions.h
+++ b/bcos-utilities/Exceptions.h
@@ -47,10 +47,9 @@ struct Exception : virtual std::exception, virtual boost::exception
 };
 
 /// construct a new exception class overriding Exception
-#define DERIVE_BCOS_EXCEPTION(X)                                      \
-    struct X : virtual Exception                                      \
-    {                                                                 \
-        explicit X(std::string _m = std::string()) : Exception(_m){}; \
+#define DERIVE_BCOS_EXCEPTION(X) \
+    struct X : virtual Exception \
+    {                            \
     }
 DERIVE_BCOS_EXCEPTION(ConstructFixedBytesFailed);
 DERIVE_BCOS_EXCEPTION(BadCast);