diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6570aa1..7e5c48a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,22 +14,16 @@ set(BUILD_SHARED_LIBS FALSE)
 
 add_subdirectory(extern/SDL EXCLUDE_FROM_ALL)
 add_subdirectory(extern/SDL_image EXCLUDE_FROM_ALL)
-add_subdirectory(extern/zlib EXCLUDE_FROM_ALL)
-set(ZLIB_ROOT ${PROJECT_SOURCE_DIR}/extern/zlib)
-set(ZLIB_LIBRARY zlib)
-add_subdirectory(extern/libpng EXCLUDE_FROM_ALL)
 
 file(GLOB_RECURSE SOURCES ${PROJECT_SOURCE_DIR}/src/*.cpp)
 add_executable(${PROJECT_NAME} ${SOURCES})
 
-target_include_directories(${PROJECT_NAME} PRIVATE ${PROJECT_SOURCE_DIR}/include)
+target_include_directories(${PROJECT_NAME} PRIVATE ${PROJECT_INCLUDE_DIR})
 
 target_link_libraries(${PROJECT_NAME} PRIVATE
     SDL2::SDL2main
     SDL2::SDL2-static
     SDL2_image::SDL2_image-static
-    ${ZLIB_LIBRARY}
-    ${PNG_LIBRARIES}
 )
 
 file(COPY ${PROJECT_SOURCE_DIR}/assets DESTINATION ${PROJECT_BINARY_DIR})
\ No newline at end of file
diff --git a/extern/libpng b/extern/libpng
deleted file mode 160000
index 71b9b5e..0000000
--- a/extern/libpng
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 71b9b5e16ef751d973a3935284382bc344ff9941
diff --git a/extern/zlib b/extern/zlib
deleted file mode 160000
index 09155ea..0000000
--- a/extern/zlib
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 09155eaa2f9270dc4ed1fa13e2b4b2613e6e4851