diff --git a/COPYRIGHT b/COPYRIGHT
index d06a3d3..0789277 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -60,7 +60,7 @@ Zach Oakes <zsoakes@gmail.com>
 Zach Ploskey <zach@ploskey.com>
 
 The Gtk-rs Project is licensed under the MIT license, see the LICENSE file
-or <http://opensource.org/licenses/MIT>.
+or <https://opensource.org/licenses/MIT>.
 
 This project provides interoperability with various GNOME libraries but doesn't
 distribute any parts of them. Distributing compiled libraries and executables
diff --git a/src/bin/cairo_png.rs b/src/bin/cairo_png.rs
index d3c4fe7..116a097 100644
--- a/src/bin/cairo_png.rs
+++ b/src/bin/cairo_png.rs
@@ -2,7 +2,7 @@
 //!
 //! This sample demonstrates how to create `ImageSurface`, draw on it
 //! and then save result to PNG file.
-//! Analog of C# example http://www.mgsloan.com/cairo_tut/stroke.cs
+//! Analog of C# example https://web.archive.org/web/20130729155927/http://www.mgsloan.com/cairo_tut/stroke.cs
 
 extern crate cairo;
 
diff --git a/src/bin/gtktest.glade b/src/bin/gtktest.glade
index 43e4521..bdbe62f 100644
--- a/src/bin/gtktest.glade
+++ b/src/bin/gtktest.glade
@@ -16,7 +16,7 @@
     <property name="can_focus">False</property>
     <property name="type_hint">dialog</property>
     <property name="program_name">Glade</property>
-    <property name="website">http://gtk-rs.org</property>
+    <property name="website">https://gtk-rs.org</property>
     <property name="authors">James T. Kirk
 Spock
 Leonard McCoy</property>
diff --git a/src/bin/menu_bar.rs b/src/bin/menu_bar.rs
index 55c34f4..bae5e57 100644
--- a/src/bin/menu_bar.rs
+++ b/src/bin/menu_bar.rs
@@ -95,7 +95,7 @@ fn build_ui(application: &gtk::Application) {
         let p = AboutDialog::new();
         p.set_authors(&["gtk-rs developers"]);
         p.set_website_label(Some("gtk-rs"));
-        p.set_website(Some("http://gtk-rs.org"));
+        p.set_website(Some("https://gtk-rs.org"));
         p.set_authors(&["Gtk-rs developers"]);
         p.set_title("About!");
         p.set_transient_for(Some(&window));
diff --git a/src/bin/menu_bar_system.rs b/src/bin/menu_bar_system.rs
index 20f06f0..66ad84c 100644
--- a/src/bin/menu_bar_system.rs
+++ b/src/bin/menu_bar_system.rs
@@ -90,7 +90,7 @@ fn add_actions(
     about.connect_activate(clone!(@weak window => move |_, _| {
         let p = AboutDialog::new();
         p.set_website_label(Some("gtk-rs"));
-        p.set_website(Some("http://gtk-rs.org"));
+        p.set_website(Some("https://gtk-rs.org"));
         p.set_authors(&["Gtk-rs developers"]);
         p.set_title("About!");
         p.set_transient_for(Some(&window));