diff --git a/hello_world.cpp b/hello_world.cpp
index 87dbeb3..43cdb38 100644
--- a/hello_world.cpp
+++ b/hello_world.cpp
@@ -3,5 +3,6 @@
 
 namespace learn_gtkmm4 {
     HelloWorld::HelloWorld(BaseObjectType *cobject, const Glib::RefPtr<Gtk::Builder> &builder) :
-            Gtk::ApplicationWindow(cobject), m_builder(builder) {}
-} // learn_gtkmm4
\ No newline at end of file
+        Gtk::ApplicationWindow(cobject), m_builder(builder) {
+    }
+} // learn_gtkmm4
diff --git a/hello_world.hpp b/hello_world.hpp
index f3ab9a8..ea2cfd0 100644
--- a/hello_world.hpp
+++ b/hello_world.hpp
@@ -7,7 +7,6 @@
 
 
 namespace learn_gtkmm4 {
-
     class HelloWorld final : public Gtk::ApplicationWindow {
     public:
         using Gtk::ApplicationWindow::BaseObjectType;
@@ -19,7 +18,6 @@ namespace learn_gtkmm4 {
     protected:
         Glib::RefPtr<Gtk::Builder> m_builder;
     };
-
 } // learn_gtkmm4
 
 #endif //LEARNGTK4_HELLO_WORLD_HPP