diff --git a/src/gtktest.rs b/src/gtktest.rs
index f866a11..4d54c7e 100644
--- a/src/gtktest.rs
+++ b/src/gtktest.rs
@@ -194,8 +194,8 @@ fn main() {
     button_recent.connect_clicked(clone!(window => move |_| {
         let dialog = gtk::RecentChooserDialog::new(Some("Recent chooser test"), Some(&window));
         dialog.add_buttons(&[
-            ("Ok", gtk::ResponseType::Ok as i32),
-            ("Cancel", gtk::ResponseType::Cancel as i32)
+            ("Ok", gtk::ResponseType::Ok.into()),
+            ("Cancel", gtk::ResponseType::Cancel.into())
         ]);
 
         dialog.run();
@@ -207,8 +207,8 @@ fn main() {
         let dialog = gtk::FileChooserDialog::new(Some("Choose a file"), Some(&window),
             gtk::FileChooserAction::Open);
         dialog.add_buttons(&[
-            ("Open", gtk::ResponseType::Ok as i32),
-            ("Cancel", gtk::ResponseType::Cancel as i32)
+            ("Open", gtk::ResponseType::Ok.into()),
+            ("Cancel", gtk::ResponseType::Cancel.into())
         ]);
 
         dialog.set_select_multiple(true);
diff --git a/src/notebook.rs b/src/notebook.rs
index 81c33ff..9aa229c 100644
--- a/src/notebook.rs
+++ b/src/notebook.rs
@@ -18,7 +18,7 @@ impl Notebook {
 
     fn create_tab(&mut self, title: &str, widget: Widget) -> u32 {
         let close_image = gtk::Image::new_from_icon_name("window-close",
-                                                         IconSize::Button as i32);
+                                                         IconSize::Button.into());
         let button = gtk::Button::new();
         let label = gtk::Label::new(Some(title));
         let tab = gtk::Box::new(Orientation::Horizontal, 0);
diff --git a/src/text_viewer.rs b/src/text_viewer.rs
index 2e13dea..e5858d8 100644
--- a/src/text_viewer.rs
+++ b/src/text_viewer.rs
@@ -24,7 +24,7 @@ fn main() {
     let toolbar = gtk::Toolbar::new();
 
     let open_icon = gtk::Image::new_from_icon_name("document-open",
-                                                   gtk::IconSize::SmallToolbar as i32);
+                                                   gtk::IconSize::SmallToolbar.into());
     let text_view = gtk::TextView::new();
 
     let open_button = gtk::ToolButton::new::<gtk::Image>(Some(&open_icon), Some("Open"));
@@ -48,10 +48,10 @@ fn main() {
         let file_chooser = gtk::FileChooserDialog::new(
             Some("Open File"), Some(&window1), gtk::FileChooserAction::Open);
         file_chooser.add_buttons(&[
-            ("Open", gtk::ResponseType::Ok as i32),
-            ("Cancel", gtk::ResponseType::Cancel as i32),
+            ("Open", gtk::ResponseType::Ok.into()),
+            ("Cancel", gtk::ResponseType::Cancel.into()),
         ]);
-        if file_chooser.run() == gtk::ResponseType::Ok as i32 {
+        if file_chooser.run() == gtk::ResponseType::Ok.into() {
             let filename = file_chooser.get_filename().unwrap();
             let file = File::open(&filename).unwrap();