diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index 1533291b2982fe9ccc93484d6f17f7bc84bca81a..c6320522ece9fcb62321ab8494d37b6c78105f61 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -52,7 +52,7 @@ if(MILVUS_VERSION_MAJOR STREQUAL ""
         OR MILVUS_VERSION_MINOR STREQUAL ""
         OR MILVUS_VERSION_PATCH STREQUAL "")
     message(WARNING "Failed to determine Milvus version from git branch name")
-    set(MILVUS_VERSION "0.3.1")
+    set(MILVUS_VERSION "0.4.0")
 endif()
 
 message(STATUS "Build version = ${MILVUS_VERSION}")