diff --git a/headers/enduro2d/core/render.inl b/headers/enduro2d/core/render.inl
index b70ee661..4b89d604 100644
--- a/headers/enduro2d/core/render.inl
+++ b/headers/enduro2d/core/render.inl
@@ -6,8 +6,6 @@
 
 #pragma once
 
-#include "_core.hpp"
-
 #include "render.hpp"
 
 namespace e2d
diff --git a/headers/enduro2d/enduro2d.hpp b/headers/enduro2d/enduro2d.hpp
index fb98d678..68204fad 100644
--- a/headers/enduro2d/enduro2d.hpp
+++ b/headers/enduro2d/enduro2d.hpp
@@ -4,6 +4,8 @@
  * Copyright (C) 2018-2019, by Matvey Cherevko (blackmatov@gmail.com)
  ******************************************************************************/
 
+#pragma once
+
 #include "base/_all.hpp"
 #include "core/_all.hpp"
 #include "high/_all.hpp"
diff --git a/headers/enduro2d/high/asset.inl b/headers/enduro2d/high/asset.inl
index 7424551b..94511359 100644
--- a/headers/enduro2d/high/asset.inl
+++ b/headers/enduro2d/high/asset.inl
@@ -6,8 +6,6 @@
 
 #pragma once
 
-#include "_high.hpp"
-
 #include "asset.hpp"
 
 namespace e2d
diff --git a/headers/enduro2d/high/factory.inl b/headers/enduro2d/high/factory.inl
index e3cc72c0..c0f95921 100644
--- a/headers/enduro2d/high/factory.inl
+++ b/headers/enduro2d/high/factory.inl
@@ -6,8 +6,6 @@
 
 #pragma once
 
-#include "_high.hpp"
-
 #include "factory.hpp"
 
 namespace e2d
diff --git a/headers/enduro2d/high/library.inl b/headers/enduro2d/high/library.inl
index d5a87020..ea57b966 100644
--- a/headers/enduro2d/high/library.inl
+++ b/headers/enduro2d/high/library.inl
@@ -6,8 +6,6 @@
 
 #pragma once
 
-#include "_high.hpp"
-
 #include "library.hpp"
 
 namespace e2d
diff --git a/headers/enduro2d/utils/filesystem.inl b/headers/enduro2d/utils/filesystem.inl
index f9b72004..12bf203e 100644
--- a/headers/enduro2d/utils/filesystem.inl
+++ b/headers/enduro2d/utils/filesystem.inl
@@ -6,7 +6,6 @@
 
 #pragma once
 
-#include "_utils.hpp"
 #include "filesystem.hpp"
 
 namespace e2d::filesystem
diff --git a/headers/enduro2d/utils/streams.inl b/headers/enduro2d/utils/streams.inl
index f26500bb..4b765e08 100644
--- a/headers/enduro2d/utils/streams.inl
+++ b/headers/enduro2d/utils/streams.inl
@@ -6,7 +6,6 @@
 
 #pragma once
 
-#include "_utils.hpp"
 #include "streams.hpp"
 
 namespace e2d
diff --git a/headers/enduro2d/utils/strings.inl b/headers/enduro2d/utils/strings.inl
index 12c97fc2..7ffafd7c 100644
--- a/headers/enduro2d/utils/strings.inl
+++ b/headers/enduro2d/utils/strings.inl
@@ -6,7 +6,6 @@
 
 #pragma once
 
-#include "_utils.hpp"
 #include "strings.hpp"
 
 namespace e2d