--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@
 #   and many OpenWRT packages require, much newer CMake packages.
 #  We're stopping before 3.10 because that version starts requiring
 #   c++11, which isn't available on e.g HPUX.
-cmake_minimum_required(VERSION 3.9...3.12)
+cmake_minimum_required(VERSION 3.10)
 
 # JSON-C library is C only project.
 # PROJECT_VERSION{,_MAJOR,_MINOR,_PATCH} set by project():
--- a/apps/CMakeLists.txt
+++ b/apps/CMakeLists.txt
@@ -1,5 +1,5 @@
 
-cmake_minimum_required(VERSION 2.8)  # see ../CMakeLists.txt for why 2.8
+cmake_minimum_required(VERSION 3.10)
 
 if(POLICY CMP0075)
     cmake_policy(SET CMP0075 NEW)