diff --git a/.gitignore b/.gitignore
index 70ba1c2..76aa0e9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 /glibmm-2.72.1.tar.xz
 /glibmm-2.74.0.tar.xz
 /glibmm-2.76.0.tar.xz
+/glibmm-2.77.0.tar.xz
diff --git a/glibmm2.68.spec b/glibmm2.68.spec
index 1e45870..b377a95 100644
--- a/glibmm2.68.spec
+++ b/glibmm2.68.spec
@@ -3,19 +3,17 @@
 %define release_version %(echo %{version} | awk -F. '{print $1"."$2}')
 
 %global libsigc_version 3.0.0
-%global glib2_version 2.73.2
+%global glib2_version 2.77.0
 
 Name:           glibmm2.68
-Version:        2.76.0
+Version:        2.77.0
 Release:        %autorelease
 Summary:        C++ interface for the GLib library
 
-License:        LGPLv2+
+License:        LGPL-2.1-or-later AND GPL-2.0-or-later
 URL:            http://www.gtkmm.org/
 Source0:        https://download.gnome.org/sources/glibmm/%{release_version}/glibmm-%{version}.tar.xz
 
-Patch0:         glibmm24-gcc11.patch
-
 BuildRequires:  doxygen
 BuildRequires:  gcc-c++
 BuildRequires:  pkgconfig(glib-2.0) >= %{glib2_version}
@@ -78,7 +76,7 @@ chmod +x $RPM_BUILD_ROOT%{_libdir}/glibmm-%{apiver}/proc/gmmproc
 
 %files
 %license COPYING
-%doc AUTHORS NEWS README.md
+%doc NEWS README.md
 %{_libdir}/libgiomm-%{apiver}.so.1*
 %{_libdir}/libglibmm-%{apiver}.so.1*
 %{_libdir}/libglibmm_generate_extra_defs-%{apiver}.so.1*
diff --git a/glibmm24-gcc11.patch b/glibmm24-gcc11.patch
deleted file mode 100644
index e00e189..0000000
--- a/glibmm24-gcc11.patch
+++ /dev/null
@@ -1,80 +0,0 @@
-diff --git a/untracked/gio/giomm/dbusconnection.cc b/untracked/gio/giomm/dbusconnection.cc
-index 9ddeeb4..9701106 100644
---- a/untracked/gio/giomm/dbusconnection.cc
-+++ b/untracked/gio/giomm/dbusconnection.cc
-@@ -494,7 +494,7 @@ Connection::send_message_with_reply(const Glib::RefPtr<Message>& message, int ti
-   const SlotAsyncReady& slot, const Glib::RefPtr<Cancellable>& cancellable)
- {
-   auto slot_copy = new SlotAsyncReady(slot);
--  volatile guint32 out_serial = 0;
-+  guint32 out_serial = 0;
-   g_dbus_connection_send_message_with_reply(gobj(), Glib::unwrap(message),
-     static_cast<GDBusSendMessageFlags>(message->get_flags()), timeout_msec, &out_serial,
-     Glib::unwrap(cancellable), &SignalProxy_async_callback, slot_copy);
-@@ -506,7 +506,7 @@ Connection::send_message_with_reply(
-   const Glib::RefPtr<Message>& message, int timeout_msec, const SlotAsyncReady& slot)
- {
-   auto slot_copy = new SlotAsyncReady(slot);
--  volatile guint32 out_serial = 0;
-+  guint32 out_serial = 0;
-   g_dbus_connection_send_message_with_reply(gobj(), Glib::unwrap(message),
-     static_cast<GDBusSendMessageFlags>(message->get_flags()), timeout_msec, &out_serial, nullptr,
-     &SignalProxy_async_callback, slot_copy);
-@@ -517,7 +517,7 @@ Glib::RefPtr<Message>
- Connection::send_message_with_reply_sync(const Glib::RefPtr<Message>& message,
-   const Glib::RefPtr<Cancellable>& cancellable, gint timeout_msec)
- {
--  volatile guint32 out_serial = 0;
-+  guint32 out_serial = 0;
-   GError* gerror = nullptr;
- 
-   GDBusMessage* result = g_dbus_connection_send_message_with_reply_sync(gobj(),
-@@ -533,7 +533,7 @@ Connection::send_message_with_reply_sync(const Glib::RefPtr<Message>& message,
- Glib::RefPtr<Message>
- Connection::send_message_with_reply_sync(const Glib::RefPtr<Message>& message, gint timeout_msec)
- {
--  volatile guint32 out_serial = 0;
-+  guint32 out_serial = 0;
-   GError* gerror = nullptr;
- 
-   GDBusMessage* result = g_dbus_connection_send_message_with_reply_sync(gobj(),
-diff --git a/gio/src/dbusconnection.ccg b/gio/src/dbusconnection.ccg
-index e28e7b4..3d9860a 100644
---- a/gio/src/dbusconnection.ccg
-+++ b/gio/src/dbusconnection.ccg
-@@ -477,7 +477,7 @@ Connection::send_message_with_reply(const Glib::RefPtr<Message>& message, int ti
-   const SlotAsyncReady& slot, const Glib::RefPtr<Cancellable>& cancellable)
- {
-   auto slot_copy = new SlotAsyncReady(slot);
--  volatile guint32 out_serial = 0;
-+  guint32 out_serial = 0;
-   g_dbus_connection_send_message_with_reply(gobj(), Glib::unwrap(message),
-     static_cast<GDBusSendMessageFlags>(message->get_flags()), timeout_msec, &out_serial,
-     Glib::unwrap(cancellable), &SignalProxy_async_callback, slot_copy);
-@@ -489,7 +489,7 @@ Connection::send_message_with_reply(
-   const Glib::RefPtr<Message>& message, int timeout_msec, const SlotAsyncReady& slot)
- {
-   auto slot_copy = new SlotAsyncReady(slot);
--  volatile guint32 out_serial = 0;
-+  guint32 out_serial = 0;
-   g_dbus_connection_send_message_with_reply(gobj(), Glib::unwrap(message),
-     static_cast<GDBusSendMessageFlags>(message->get_flags()), timeout_msec, &out_serial, nullptr,
-     &SignalProxy_async_callback, slot_copy);
-@@ -500,7 +500,7 @@ Glib::RefPtr<Message>
- Connection::send_message_with_reply_sync(const Glib::RefPtr<Message>& message,
-   const Glib::RefPtr<Cancellable>& cancellable, gint timeout_msec)
- {
--  volatile guint32 out_serial = 0;
-+  guint32 out_serial = 0;
-   GError* gerror = nullptr;
- 
-   GDBusMessage* result = g_dbus_connection_send_message_with_reply_sync(gobj(),
-@@ -516,7 +516,7 @@ Connection::send_message_with_reply_sync(const Glib::RefPtr<Message>& message,
- Glib::RefPtr<Message>
- Connection::send_message_with_reply_sync(const Glib::RefPtr<Message>& message, gint timeout_msec)
- {
--  volatile guint32 out_serial = 0;
-+  guint32 out_serial = 0;
-   GError* gerror = nullptr;
- 
-   GDBusMessage* result = g_dbus_connection_send_message_with_reply_sync(gobj(),
diff --git a/sources b/sources
index 254445a..c532ef1 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glibmm-2.76.0.tar.xz) = be49599f5eb8eb5a1cef015cdb37af2564fcd1ea845aa4344804ca5f0f61468949711e25cefebb93219e1be37128ebfdd2a816324e752ac4395b4b87c072fc78
+SHA512 (glibmm-2.77.0.tar.xz) = 6650e822de2529582d93291025500afb6a182a0c5a564f656f164d79d8765bb4ca9c9d16227148431cc71c2677923b9364e81bbd4ca4f07f68e36bb380fb9574