--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.0)
+cmake_minimum_required(VERSION 3.20)
 include(FindPkgConfig)
 pkg_check_modules(CURLPP REQUIRED curlpp)
 
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,4 @@
+cmake_minimum_required(VERSION 3.20)
 project(curlpp) 
 
 
@@ -15,7 +16,6 @@ include(GNUInstallDirs)
 
 if(WIN32)
     # cmake 3.4 is required for CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS
-    cmake_minimum_required(VERSION 3.4)
 
     # c++ 11 support from cmake 3.4 or newer
     set(CMAKE_CXX_STANDARD 11) # C++11...
@@ -25,7 +25,6 @@ if(WIN32)
     set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
   else()
     if (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} VERSION_LESS 3.1)
-        cmake_minimum_required(VERSION 2.8)
         # c++11 support for cmake 2.8.12 - 3.0.x
         #
         # for non-windows platform we try to keep cmake 2.8 support