diff --git a/CMakeLists.txt b/CMakeLists.txt
index 72905e1..53f67b3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,4 +4,6 @@ project(CppMpInt)
 
 set(CMAKE_CXX_STANDARD 20)
 
-add_executable(main main.cpp)
+add_executable(main src/main.cpp)
+
+target_include_directories(main PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/src)
diff --git a/main.cpp b/src/main.cpp
similarity index 100%
rename from main.cpp
rename to src/main.cpp
diff --git a/mp/int.hpp b/src/mp/int.hpp
similarity index 100%
rename from mp/int.hpp
rename to src/mp/int.hpp
diff --git a/mp/lib.hpp b/src/mp/lib.hpp
similarity index 100%
rename from mp/lib.hpp
rename to src/mp/lib.hpp
diff --git a/mp/math.hpp b/src/mp/math.hpp
similarity index 100%
rename from mp/math.hpp
rename to src/mp/math.hpp
diff --git a/mp/mp.hpp b/src/mp/mp.hpp
similarity index 100%
rename from mp/mp.hpp
rename to src/mp/mp.hpp
diff --git a/mp/storage.hpp b/src/mp/storage.hpp
similarity index 100%
rename from mp/storage.hpp
rename to src/mp/storage.hpp
diff --git a/mp/utils.hpp b/src/mp/utils.hpp
similarity index 100%
rename from mp/utils.hpp
rename to src/mp/utils.hpp