diff --git a/CMakeLists.txt b/CMakeLists.txt
index 314b7f6a..dad26e03 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.7...3.28)
 project(putty LANGUAGES C)
 
 set(CMAKE_C_STANDARD 99)
diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index ef77eb12..35673996 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.7...3.28)
 project(putty-documentation LANGUAGES)
 
 # This build script can be run standalone, or included as a
diff --git a/test/sclog/CMakeLists.txt b/test/sclog/CMakeLists.txt
index 8a8ac570..9f9f75f9 100644
--- a/test/sclog/CMakeLists.txt
+++ b/test/sclog/CMakeLists.txt
@@ -2,7 +2,7 @@
 # goes with the PuTTY test binary 'testsc'. For build instructions see
 # the comment at the top of testsc.c.
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.7...3.28)
 
 project(sclog LANGUAGES C)