diff --git a/CMakeLists.txt b/CMakeLists.txt
index ed67c05..469690c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,19 +2,19 @@ cmake_minimum_required(VERSION 3.15)
 project(fastimagehash)
 
 
-set(BUILD_UT OFF)
+set(BUILD_UT OFF CACHE INTERNAL "")
 add_subdirectory(thirdparty/wavelib)
 
-set(BENCHMARK_ENABLE_GTEST_TESTS OFF)
-set(BENCHMARK_ENABLE_TESTING OFF)
-set(BENCHMARK_ENABLE_INSTALL OFF)
-set(CMAKE_BUILD_TYPE RELEASE)
+set(BENCHMARK_ENABLE_GTEST_TESTS OFF CACHE INTERNAL "")
+set(BENCHMARK_ENABLE_TESTING OFF CACHE INTERNAL "")
+set(BENCHMARK_ENABLE_INSTALL OFF CACHE INTERNAL "")
+set(CMAKE_BUILD_TYPE RELEASE CACHE INTERNAL "")
 add_subdirectory(thirdparty/benchmark)
 
 set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_C_STANDARD 11)
 
-set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "cmake/")
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "cmake/" CACHE INTERNAL "")
 
 find_package(OpenCV REQUIRED)
 find_package(FFTW REQUIRED)