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/atk-sys/Cargo.toml b/atk-sys/Cargo.toml
index 9d6481f..e15b3ea 100644
--- a/atk-sys/Cargo.toml
+++ b/atk-sys/Cargo.toml
@@ -27,7 +27,7 @@ name = "atk_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libatk-1"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["atk", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "atk-1.0"
diff --git a/gdk-pixbuf-sys/Cargo.toml b/gdk-pixbuf-sys/Cargo.toml
index b87ac8d..b794032 100644
--- a/gdk-pixbuf-sys/Cargo.toml
+++ b/gdk-pixbuf-sys/Cargo.toml
@@ -31,7 +31,7 @@ name = "gdk_pixbuf_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libgdk_pixbuf-2.0"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["gdk-pixbuf", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "gdk_pixbuf-2.0"
diff --git a/gdk-sys/Cargo.toml b/gdk-sys/Cargo.toml
index d0b3d25..2133f56 100644
--- a/gdk-sys/Cargo.toml
+++ b/gdk-sys/Cargo.toml
@@ -42,7 +42,7 @@ name = "gdk_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libgdk-3"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["gdk", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "gdk-3"
diff --git a/gdk4-sys/Cargo.toml b/gdk4-sys/Cargo.toml
index 8258df3..1175405 100644
--- a/gdk4-sys/Cargo.toml
+++ b/gdk4-sys/Cargo.toml
@@ -36,7 +36,7 @@ name = "gdk4_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libgdk-4"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["gdk", "gdk4", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "gtk-4"
diff --git a/gdkx11-sys/Cargo.toml b/gdkx11-sys/Cargo.toml
index 222b256..2fa9d6a 100644
--- a/gdkx11-sys/Cargo.toml
+++ b/gdkx11-sys/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 authors = ["The Gtk-rs Project Developers"]
 description = "FFI binding for libgdkx11"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["gdkx11", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 repository = "https://github.com/gtk-rs/sys"
diff --git a/gdkx11-sys/src/manual.rs b/gdkx11-sys/src/manual.rs
index 09aa273..ce05978 100644
--- a/gdkx11-sys/src/manual.rs
+++ b/gdkx11-sys/src/manual.rs
@@ -1,5 +1,5 @@
 // Copyright 2013-2020, The Gtk-rs Project Developers.
 // See the COPYRIGHT file at the top-level directory of this distribution.
-// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>
+// Licensed under the MIT license, see the LICENSE file or <https://opensource.org/licenses/MIT>
 
 pub use x11::xlib;
diff --git a/gio-sys/Cargo.toml b/gio-sys/Cargo.toml
index 542c40f..3a662a1 100644
--- a/gio-sys/Cargo.toml
+++ b/gio-sys/Cargo.toml
@@ -38,7 +38,7 @@ name = "gio_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libgio-2.0"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["gio", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "gio-2.0"
diff --git a/gio-sys/src/manual.rs b/gio-sys/src/manual.rs
index 96f95ac..86e5f8b 100644
--- a/gio-sys/src/manual.rs
+++ b/gio-sys/src/manual.rs
@@ -1,6 +1,6 @@
 // Copyright 2013-2020, The Gtk-rs Project Developers.
 // See the COPYRIGHT file at the top-level directory of this distribution.
-// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>
+// Licensed under the MIT license, see the LICENSE file or <https://opensource.org/licenses/MIT>
 
 #[cfg(not(target_family = "windows"))]
 pub use self::libc_constants::*;
diff --git a/glib-sys/Cargo.toml b/glib-sys/Cargo.toml
index 32bc56b..f3698a5 100644
--- a/glib-sys/Cargo.toml
+++ b/glib-sys/Cargo.toml
@@ -29,7 +29,7 @@ name = "glib_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libglib-2.0"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["glib", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "glib-2.0"
diff --git a/glib-sys/src/manual.rs b/glib-sys/src/manual.rs
index 38a9644..81d5c0d 100644
--- a/glib-sys/src/manual.rs
+++ b/glib-sys/src/manual.rs
@@ -1,6 +1,6 @@
 // Copyright 2013-2018, The Gtk-rs Project Developers.
 // See the COPYRIGHT file at the top-level directory of this distribution.
-// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>
+// Licensed under the MIT license, see the LICENSE file or <https://opensource.org/licenses/MIT>
 
 #[allow(unused_imports)]
 use libc::{c_char, c_int, c_ushort, c_void};
diff --git a/gobject-sys/Cargo.toml b/gobject-sys/Cargo.toml
index def0df9..ee6bec1 100644
--- a/gobject-sys/Cargo.toml
+++ b/gobject-sys/Cargo.toml
@@ -26,7 +26,7 @@ name = "gobject_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libgobject-2.0"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["gobject", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "gobject-2.0"
diff --git a/gsk4-sys/Cargo.toml b/gsk4-sys/Cargo.toml
index b673604..c0187f5 100644
--- a/gsk4-sys/Cargo.toml
+++ b/gsk4-sys/Cargo.toml
@@ -36,7 +36,7 @@ name = "gsk4_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libgsk-4"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["gsk", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "gtk-4"
diff --git a/gtk-sys/Cargo.toml b/gtk-sys/Cargo.toml
index 0f0314e..e766c04 100644
--- a/gtk-sys/Cargo.toml
+++ b/gtk-sys/Cargo.toml
@@ -5,7 +5,7 @@ links = "gtk-3"
 build = "build.rs"
 authors = ["The Gtk-rs Project Developers"]
 description = "FFI bindings to libgtk-3"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["gtk", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 repository = "https://github.com/gtk-rs/sys"
diff --git a/gtk-sys/src/manual.rs b/gtk-sys/src/manual.rs
index 2498647..14d924b 100644
--- a/gtk-sys/src/manual.rs
+++ b/gtk-sys/src/manual.rs
@@ -1,6 +1,6 @@
 // Copyright 2013-2017, The Gtk-rs Project Developers.
 // See the COPYRIGHT file at the top-level directory of this distribution.
-// Licensed under the MIT license, see the LICENSE file or <http://opensource.org/licenses/MIT>
+// Licensed under the MIT license, see the LICENSE file or <https://opensource.org/licenses/MIT>
 
 pub mod xlib {
     pub type Window = i32;
diff --git a/gtk4-sys/Cargo.toml b/gtk4-sys/Cargo.toml
index e4463eb..91acf40 100644
--- a/gtk4-sys/Cargo.toml
+++ b/gtk4-sys/Cargo.toml
@@ -48,7 +48,7 @@ name = "gtk4_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libgtk-4"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["gtk", "gtk4", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "gtk-4"
diff --git a/pango-sys/Cargo.toml b/pango-sys/Cargo.toml
index 113bfa1..3b02eaf 100644
--- a/pango-sys/Cargo.toml
+++ b/pango-sys/Cargo.toml
@@ -28,7 +28,7 @@ name = "pango_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libpango-1.0"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["pango", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "pango-1.0"
diff --git a/pangocairo-sys/Cargo.toml b/pangocairo-sys/Cargo.toml
index 3863344..ca62e09 100644
--- a/pangocairo-sys/Cargo.toml
+++ b/pangocairo-sys/Cargo.toml
@@ -27,7 +27,7 @@ name = "pango_cairo_sys"
 authors = ["The Gtk-rs Project Developers"]
 build = "build.rs"
 description = "FFI bindings to libgtk-3"
-homepage = "http://gtk-rs.org/"
+homepage = "https://gtk-rs.org/"
 keywords = ["gtk", "ffi", "gtk-rs", "gnome"]
 license = "MIT"
 links = "pangocairo-1.0"