diff --git a/v2_0_cpp_unpacker.md b/v2_0_cpp_unpacker.md
index fac81a9..0fd9228 100644
--- a/v2_0_cpp_unpacker.md
+++ b/v2_0_cpp_unpacker.md
@@ -210,7 +210,7 @@ Those msgpack::unpack functions may throw msgpack::unpack_error.
 * You get msgpack::unpack_error with "parse error" message if the buffer's msgpack data is invalid format.
 * You get msgpack::unpack_error with "insufficient bytes" message if the buffer from off(offset) position contains incomplete msgpack data.
 
-In order to use these unpack functions, the client need to prepare sevral number of complete msgpack data. If the client may get incomplete msgpack data, then use msgpack::unpacker.
+In order to use these unpack functions, the client need to prepare several number of complete msgpack data. If the client may get incomplete msgpack data, then use msgpack::unpacker.
 
 #### Limit size of elements