diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6434308..9a21a4e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,9 +1,11 @@
 # CMake 3.12.4 required for 20 to be a valid value for CXX_STANDARD
-cmake_minimum_required(VERSION 3.15)
-# Add MSVC runtime library selection flags automatically:
-cmake_policy(SET CMP0091 OLD)
-# Don't override the warning flags in MSVC:
-cmake_policy(SET CMP0092 NEW)
+cmake_minimum_required(VERSION 3.12.4)
+if (${CMAKE_VERSION} VERSION_GREATER_EQUAL 3.15)
+    # Add MSVC runtime library selection flags automatically:
+    cmake_policy(SET CMP0091 OLD)
+    # Don't override the warning flags in MSVC:
+    cmake_policy(SET CMP0092 NEW)
+endif ()
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/CMakeModules")
 include(DownloadExternals)
 include(CMakeDependentOption)