diff --git a/CMakeLists.txt b/CMakeLists.txt
index d9aace75..7fa1a186 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -128,12 +128,12 @@ set(HPP_HEADER_FILES
   include/QtNodes/internal/Serializable.hpp
   include/QtNodes/internal/Style.hpp
   include/QtNodes/internal/StyleCollection.hpp
-  src/DefaultConnectionPainter.hpp
-  src/DefaultHorizontalNodeGeometry.hpp
-  src/DefaultNodePainter.hpp
-  src/DefaultVerticalNodeGeometry.hpp
-  src/NodeConnectionInteraction.hpp
-  src/UndoCommands.hpp
+  include/QtNodes/internal/DefaultConnectionPainter.hpp
+  include/QtNodes/internal/DefaultHorizontalNodeGeometry.hpp
+  include/QtNodes/internal/DefaultNodePainter.hpp
+  include/QtNodes/internal/DefaultVerticalNodeGeometry.hpp
+  include/QtNodes/internal/NodeConnectionInteraction.hpp
+  include/QtNodes/internal/UndoCommands.hpp
 )
 
 # If we want to give the option to build a static library,
diff --git a/src/DefaultConnectionPainter.hpp b/include/QtNodes/internal/DefaultConnectionPainter.hpp
similarity index 100%
rename from src/DefaultConnectionPainter.hpp
rename to include/QtNodes/internal/DefaultConnectionPainter.hpp
diff --git a/src/DefaultHorizontalNodeGeometry.hpp b/include/QtNodes/internal/DefaultHorizontalNodeGeometry.hpp
similarity index 100%
rename from src/DefaultHorizontalNodeGeometry.hpp
rename to include/QtNodes/internal/DefaultHorizontalNodeGeometry.hpp
diff --git a/src/DefaultNodePainter.hpp b/include/QtNodes/internal/DefaultNodePainter.hpp
similarity index 100%
rename from src/DefaultNodePainter.hpp
rename to include/QtNodes/internal/DefaultNodePainter.hpp
diff --git a/src/DefaultVerticalNodeGeometry.hpp b/include/QtNodes/internal/DefaultVerticalNodeGeometry.hpp
similarity index 100%
rename from src/DefaultVerticalNodeGeometry.hpp
rename to include/QtNodes/internal/DefaultVerticalNodeGeometry.hpp
diff --git a/src/NodeConnectionInteraction.hpp b/include/QtNodes/internal/NodeConnectionInteraction.hpp
similarity index 100%
rename from src/NodeConnectionInteraction.hpp
rename to include/QtNodes/internal/NodeConnectionInteraction.hpp
diff --git a/src/UndoCommands.hpp b/include/QtNodes/internal/UndoCommands.hpp
similarity index 100%
rename from src/UndoCommands.hpp
rename to include/QtNodes/internal/UndoCommands.hpp