diff --git a/CMakeLists.txt b/CMakeLists.txt
index 823acb4..5edac56 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -8,9 +8,16 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 find_package(Threads REQUIRED)
 list(APPEND CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
 
-set(FMT_USE_CPP11 OFF)
-set(FMT_TEST OFF)
-set(FMT_USE_CPP11 OFF)
+## CMP0063
+if (POLICY CMP0063)
+    cmake_policy(SET CMP0063 NEW)
+endif ()
+if (POLICY CMP0048)
+    cmake_policy(SET CMP0048 NEW)
+endif ()
+set(FMT_USE_CPP11 OFF CACHE BOOL "Use C++11" FORCE)
+set(FMT_TEST OFF CACHE BOOL "Build tests" FORCE)
+set(FMT_USE_CPP11 OFF CACHE BOOL "Use C++11" FORCE)
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/3party/fmt)
 
 option(ULIB_BUILD_TESTS "Build tests" OFF)