diff --git a/library.properties b/library.properties
index f86bed8..43bf496 100644
--- a/library.properties
+++ b/library.properties
@@ -1,8 +1,8 @@
 name=Dynamixel2Arduino
-version=0.7.0
+version=0.8.0
 author=ROBOTIS
 license=Apache-2.0
-maintainer=HongHyun Kim(khh@robotis.com)
+maintainer=Sookyung Son(sukaa@robotis.com)
 sentence=DYNAMIXEL protocol Library for Arduino
 paragraph=This library helps the Arduino boards to communicate with DYNAMIXEL protocol.
 category=Communication
diff --git a/src/dxl_c/protocol.h b/src/dxl_c/protocol.h
index 95cdbac..e593216 100644
--- a/src/dxl_c/protocol.h
+++ b/src/dxl_c/protocol.h
@@ -99,7 +99,7 @@ struct InfoBulkWriteInst_t {
 
 }
 
-using namespace DYNAMIXEL;
+//using namespace DYNAMIXEL;  //comment out for fixed build error
 
 #ifdef __cplusplus
 extern "C" {