diff --git a/examples/server/CMakeLists.txt b/examples/server/CMakeLists.txt
index 500544b..fea606b 100644
--- a/examples/server/CMakeLists.txt
+++ b/examples/server/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.1)
 project(basic_server)
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread -std=c++11")