diff --git a/CMakeLists.txt b/CMakeLists.txt
index c8505d1e..582041c3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,9 @@
-cmake_minimum_required(VERSION 3.22)
+cmake_minimum_required(VERSION 3.8)
 
 project(cmake)
 
+cmake_policy(SET CMP0069 NEW)
+
 # *****************************************************************************
 # Append cmake search path
 # *****************************************************************************
diff --git a/source/CMakeLists.txt b/source/CMakeLists.txt
index dd530cfd..c195422b 100644
--- a/source/CMakeLists.txt
+++ b/source/CMakeLists.txt
@@ -2,6 +2,8 @@
 # *****************************************************************************
 # Project canary map editor
 # *****************************************************************************
+cmake_minimum_required(VERSION 3.8)
+
 project(canary-map-editor)
 
 find_package(asio CONFIG REQUIRED)
@@ -55,19 +57,6 @@ else()
 	log_option_disabled("openmp")
 endif()
 
-# === IPO ===
-check_ipo_supported(RESULT result OUTPUT output)
-if(result)
-	set_property(TARGET ${PROJECT_NAME} PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
-else()
-	message(WARNING "IPO is not supported: ${output}")
-endif()
-
-# === PRECOMPILED HEADER ===
-target_precompile_headers(${PROJECT_NAME} PRIVATE main.h)
-
-
-
 target_sources(${PROJECT_NAME}
 	PRIVATE
 	about_window.cpp
@@ -178,14 +167,12 @@ target_sources(${PROJECT_NAME}
 target_include_directories(${PROJECT_NAME}
 	PRIVATE
 	${CMAKE_SOURCE_DIR}/source
-	${OPENGL_INCLUDE_DIR}
 	${GLUT_INCLUDE_DIRS}
 	${ZLIB_INCLUDE_DIR}
 )
 
 target_link_libraries(${PROJECT_NAME}
 	PRIVATE
-	${OPENGL_LIBRARIES}
 	${GLUT_LIBRARIES}
 	${ZLIB_LIBRARIES}
 	fmt::fmt
@@ -194,6 +181,7 @@ target_link_libraries(${PROJECT_NAME}
 	pugixml::pugixml
 	wx::base wx::core wx::net wx::gl wx::html wx::aui wx::adv
 	liblzma::liblzma
+	OpenGL::GL
 	protobuf
 )
 
diff --git a/source/protobuf/CMakeLists.txt b/source/protobuf/CMakeLists.txt
index c2060b1d..a83cfea6 100644
--- a/source/protobuf/CMakeLists.txt
+++ b/source/protobuf/CMakeLists.txt
@@ -1,6 +1,8 @@
 # *****************************************************************************
 # Project protobuf
 # *****************************************************************************
+cmake_minimum_required(VERSION 3.8)
+
 project(protobuf)
 
 find_package(Protobuf REQUIRED)