diff --git a/00-fix-gdbus-codegen.patch b/00-fix-gdbus-codegen.patch
new file mode 100644
index 0000000..9977f41
--- /dev/null
+++ b/00-fix-gdbus-codegen.patch
@@ -0,0 +1,13 @@
+diff --git a/gio/gdbus-2.0/codegen/codegen_main.py b/gio/gdbus-2.0/codegen/codegen_main.py
+index 9d9099f..1cfe7c1 100755
+--- a/gio/gdbus-2.0/codegen/codegen_main.py
++++ b/gio/gdbus-2.0/codegen/codegen_main.py
+@@ -209,7 +209,7 @@ def codegen_main():
+             print_error('Using --body requires --output')
+ 
+         c_file = args.output
+-        header_name = os.path.splitext(c_file)[0] + '.h'
++        header_name = os.path.splitext(os.path.basename(c_file))[0] + '.h'
+ 
+     all_ifaces = []
+     for fname in args.files + args.xml_files:
diff --git a/0002-GNetworkMonitorBase-don-t-fail-when-IPv6-support-is-.patch b/0002-GNetworkMonitorBase-don-t-fail-when-IPv6-support-is-.patch
deleted file mode 100644
index 0b821bd..0000000
--- a/0002-GNetworkMonitorBase-don-t-fail-when-IPv6-support-is-.patch
+++ /dev/null
@@ -1,34 +0,0 @@
-From c36872f048824248ff8348eaf66134194becaedc Mon Sep 17 00:00:00 2001
-From: Erik van Pienbroek <epienbro@fedoraproject.org>
-Date: Thu, 17 Jul 2014 21:24:28 +0200
-Subject: [PATCH 2/2] GNetworkMonitorBase: don't fail when IPv6 support is
- unavailable
-
----
- gio/gnetworkmonitorbase.c | 10 ++++++++--
- 1 file changed, 8 insertions(+), 2 deletions(-)
-
-diff --git a/gio/gnetworkmonitorbase.c b/gio/gnetworkmonitorbase.c
-index f0af804..32ffc74 100644
---- a/gio/gnetworkmonitorbase.c
-+++ b/gio/gnetworkmonitorbase.c
-@@ -100,8 +100,14 @@ g_network_monitor_base_constructed (GObject *object)
-       g_object_unref (mask);
- 
-       mask = g_inet_address_mask_new_from_string ("::/0", NULL);
--      g_network_monitor_base_add_network (monitor, mask);
--      g_object_unref (mask);
-+      if (mask)
-+        {
-+          /* On some environments (for example Windows without IPv6 support
-+           * enabled) the string "::/0" can't be processed and causes
-+           * g_inet_address_mask_new_from_string to return NULL */
-+          g_network_monitor_base_add_network (monitor, mask);
-+          g_object_unref (mask);
-+        }
-     }
- }
- 
--- 
-2.0.1
-
diff --git a/mingw-glib2.spec b/mingw-glib2.spec
index edbe713..0c37927 100644
--- a/mingw-glib2.spec
+++ b/mingw-glib2.spec
@@ -4,8 +4,8 @@
 %global __python %{__python3}
 
 Name:           mingw-glib2
-Version:        2.54.1
-Release:        2%{?dist}
+Version:        2.56.1
+Release:        1%{?dist}
 Summary:        MinGW Windows GLib2 library
 
 License:        LGPLv2+
@@ -40,6 +40,10 @@ BuildRequires:  gettext
 BuildRequires:  glib2-devel >= 2.45.3
 BuildRequires:  python3-devel
 
+# Include upstream patch to fix gdbus-codegen when used with meson 0.46
+# https://gitlab.gnome.org/GNOME/glib/commit/cd1f82d8fc741a2203582c12cc21b4dacf7e1872
+Patch0:         00-fix-gdbus-codegen.patch
+
 # https://bugzilla.gnome.org/show_bug.cgi?id=674214
 Patch1:         0001-Use-CreateFile-on-Win32-to-make-sure-g_unlink-always.patch
 
@@ -50,10 +54,6 @@ Patch1:         0001-Use-CreateFile-on-Win32-to-make-sure-g_unlink-always.patch
 # https://bugzilla.gnome.org/show_bug.cgi?id=698118
 Patch5:         glib-prefer-constructors-over-DllMain.patch
 
-# Don't segfault when IPv6 support is unavailable
-# https://bugzilla.gnome.org/show_bug.cgi?id=733338
-Patch8:         0002-GNetworkMonitorBase-don-t-fail-when-IPv6-support-is-.patch
-
 %description
 MinGW Windows Glib2 library.
 
@@ -97,9 +97,9 @@ Static version of the MinGW Windows GLib2 library.
 
 %prep
 %setup -q -n glib-%{version}
+%patch0 -p1
 %patch1 -p1
 %patch5 -p1
-%patch8 -p1
 
 %build
 #GLib can't build static and shared libraries in one go, so we build GLib twice
@@ -283,6 +283,9 @@ find $RPM_BUILD_ROOT -name "*.la" -delete
 
 
 %changelog
+* Mon May 28 2018 Thomas Sailer <t.sailer@alumni.ethz.ch> - 2.56.1-1
+- Update to 2.56.1
+
 * Thu Feb 08 2018 Fedora Release Engineering <releng@fedoraproject.org> - 2.54.1-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
 
diff --git a/sources b/sources
index 5ed6023..2016ac1 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glib-2.54.1.tar.xz) = 2971feede03540f5cd2b4bd60b0c3fcbd5ad95ba96d07f6e6d3f4a6b90c31555e52f3480b51976574642fd5ab99dd557061ee5db1a1855fc601297cd74a8f1a8
+SHA512 (glib-2.56.1.tar.xz) = 7e96cc23f3fa42a41b1974ae8fa2a7b123449643f265763d464620afcb011668e2de013ed2a6e5f13b6bd1bf3ab8eab43c05bf4a8ee0d99b7808767ab4fa69f4