diff --git a/CMakeLists.txt b/CMakeLists.txt
index f5b1305..9409d74 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,7 +15,7 @@ set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_CLANG_TIDY clang-tidy;-header-filter=.;)
 
 file(GLOB_RECURSE SOURCES src/*.cpp)
-file(GLOB_RECURSE HEADERS src/*.h)
+file(GLOB_RECURSE HEADERS src/*.hpp)
 file(GLOB_RECURSE TESTS test/*.cpp)
 
 set(LIB_PATH "${CMAKE_SOURCE_DIR}/../library")