diff --git a/CMakeLists.txt b/CMakeLists.txt
index c62b2cf..457bb7f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.16)
 
-project(NurbsIntersection LANGUAGE CXX)
+project(NurbsIntersection LANGUAGES CXX)
 
 # C++ 11 is required
 set(CMAKE_CXX_STANDARD 11)
@@ -16,12 +16,17 @@ igl_include(glfw)
 
 # add include directories
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/include)
+include_directories(${CMAKE_CURRENT_SOURCE_DIR}/3rdparty)
 
-# add source file
-file(GLOB SRC_FILES ${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp)
+# add source files
+file(GLOB_RECURSE SRC_FILES ${CMAKE_CURRENT_SOURCE_DIR}/src/*.cpp)
+# add header files
+file(GLOB_RECURSE HEADER_FILES ${CMAKE_CURRENT_SOURCE_DIR}/include/*.hpp)
 
+source_group("Header Files" FILES ${HEADER_FILES})
 
-add_executable(${PROJECT_NAME} ${SRC_FILES})
+
+add_executable(${PROJECT_NAME} ${SRC_FILES} ${HEADER_FILES} )
 
 
 target_link_libraries(${PROJECT_NAME} PUBLIC igl::glfw)