diff --git a/CMakeLists.txt b/CMakeLists.txt
index 88ef291..7a37ba9 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,11 @@
+cmake_minimum_required(VERSION 3.0)
 # 设置项目名称
 project(ChaCha20_DRBG)
 
 # 添加可执行文件的源文件
 add_executable(chacha ChaCha20_DRBG.c)
+target_link_libraries(chacha m) # 链接数学库 (-lm)
+
 
 # 添加编译选项，以启用调试信息
 set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -g")