diff --git a/.cmake.conf b/.cmake.conf
index a63f70d6b98..848faeb55d5 100644
--- a/.cmake.conf
+++ b/.cmake.conf
@@ -13,5 +13,5 @@ set(QT_MIN_SUPPORTED_CMAKE_VERSION "3.16")
 #       because that file is used in-place by a superbuild, so there is no
 #       opportunity for substituting the values from here. Keep both locations
 #       in sync.
-set(QT_MIN_NEW_POLICY_CMAKE_VERSION "3.14")
-set(QT_MAX_NEW_POLICY_CMAKE_VERSION "3.19")
+set(QT_MIN_NEW_POLICY_CMAKE_VERSION "3.16")
+set(QT_MAX_NEW_POLICY_CMAKE_VERSION "3.20")
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 334c2496c7f..35ee14102e7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,9 @@
 # Need an explicit call at the top level. This is the absolute minimum version
 # needed to configure the project with any combination of enabled features.
 # The call to qt_build_repo_begin() will upgrade policies further.
+#
+# The absolute minimum version for building Qt is 3.16 because for metatype.json generation, we
+# depend on being able to find the location of json files created by AUTOMOC/moc.
 cmake_minimum_required(VERSION 3.16)
 
 # Get the repo version and CMake policy details
diff --git a/cmake/QtBuildInternals/QtBuildInternalsConfig.cmake b/cmake/QtBuildInternals/QtBuildInternalsConfig.cmake
index f100e4ab448..7ebe0a5744b 100644
--- a/cmake/QtBuildInternals/QtBuildInternalsConfig.cmake
+++ b/cmake/QtBuildInternals/QtBuildInternalsConfig.cmake
@@ -1,5 +1,5 @@
 # These values should be kept in sync with those in qtbase/.cmake.conf
-cmake_minimum_required(VERSION 3.14...3.19)
+cmake_minimum_required(VERSION 3.16...3.20)
 
 ###############################################
 #