diff --git a/CMakeLists.txt b/CMakeLists.txt
index 91ee6f0..7362aba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,13 @@
 cmake_minimum_required(VERSION 3.10.0)
 project(PssPhoto VERSION 0.1.0 LANGUAGES C CXX)
 
-add_library(PssPhoto PssPhoto.cpp)
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED True)
+
+#add_library(PssPhoto src/main.cpp
+#        include/pss/definitions.h)
+
+include_directories(src)
 
 include(CTest)
 enable_testing()
diff --git a/PssPhoto.cpp b/PssPhoto.cpp
deleted file mode 100644
index 474a621..0000000
--- a/PssPhoto.cpp
+++ /dev/null
@@ -1,5 +0,0 @@
-#include <iostream>
-
-void say_hello(){
-    std::cout << "Hello, from PssPhoto!\n";
-}
diff --git a/include/pss/definitions.h b/include/pss/definitions.h
new file mode 100644
index 0000000..9e2465b
--- /dev/null
+++ b/include/pss/definitions.h
@@ -0,0 +1,4 @@
+#ifndef PSSPHOTO_DEFINITIONS_H
+#define PSSPHOTO_DEFINITIONS_H
+
+#endif //PSSPHOTO_DEFINITIONS_H