diff --git a/gcc8.patch b/gcc8.patch
deleted file mode 100644
index c9e496c..0000000
--- a/gcc8.patch
+++ /dev/null
@@ -1,13 +0,0 @@
-Index: glibmm-2.52.1/glib/glibmm/threads.h
-===================================================================
---- glibmm-2.52.1.orig/glib/glibmm/threads.h
-+++ glibmm-2.52.1/glib/glibmm/threads.h
-@@ -657,7 +657,7 @@ public:
-    */
-   inline void replace(T* data);
- 
--  GPrivate* gobj() { return gobject_; }
-+  GPrivate* gobj() { return &gobject_; }
- 
- private:
-   GPrivate gobject_;
diff --git a/glibmm-2.52.1.tar.xz b/glibmm-2.52.1.tar.xz
deleted file mode 100644
index 5e963be..0000000
--- a/glibmm-2.52.1.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:dc19d20fb6b24d6b6da7cbe1b2190b38ae6ad64e6b93fecdcce71b995f43c975
-size 6451164
diff --git a/glibmm-2.56.0.tar.xz b/glibmm-2.56.0.tar.xz
new file mode 100644
index 0000000..eb0c947
--- /dev/null
+++ b/glibmm-2.56.0.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:6e74fcba0d245451c58fc8a196e9d103789bc510e1eee1a9b1e816c5209e79a9
+size 6859520
diff --git a/glibmm2_4.changes b/glibmm2_4.changes
index bf74945..11a2a71 100644
--- a/glibmm2_4.changes
+++ b/glibmm2_4.changes
@@ -1,3 +1,34 @@
+-------------------------------------------------------------------
+Sat Mar 31 11:16:47 UTC 2018 - bjorn.lie@gmail.com
+
+- Update to version 2.56.0:
+  + Glib:
+    - Threads::Private: Fix gobj() (bgo#791711).
+    - TimeoutSource: Use monotonic time consistently (bgo#792524).
+    - Add RefPtr::get(). (bgo#495762).
+  + Gio:
+    - TlsClientConnection: Deprecate set/get/property_use_ssl3().
+    - DataInputStream: Deprecate read_until().
+    - Application: Add property_resource_base_path_string(). This
+      is a replacement for property_resource_base_path() which
+      can't be fixed without breaking ABI (bgo#787496).
+    - Application: Add three set_option_context_*() methods.
+    - DesktopAppInfo: Add get_locale_string().
+  + Documentation: Slightly elaborate Glib::Variant<Variant> docs
+    (bgo#778219).
+  + tests:
+    - glibmm_variant: Don't use C++14 features when a C++11
+      compiler is used (bgo#787648).
+    - glibmm_interface_move test: Avoid unused function warnings.
+  + gmmproc:
+    - _WRAP_METHOD:
+      . Accept optional list of exceptions in errthrow
+        (bgo#787979).
+      . Suppress the @return section in generated documentation if
+        return type is void (bgo#787978).
+    - Add _MEMBER_SET_STR macro, setter for strings (bgo#793778).
+- Drop gcc8.patch: Fixed upstream.
+
 -------------------------------------------------------------------
 Wed Feb 28 16:26:47 UTC 2018 - dimstar@opensuse.org
 
diff --git a/glibmm2_4.spec b/glibmm2_4.spec
index dcc11b1..131f025 100644
--- a/glibmm2_4.spec
+++ b/glibmm2_4.spec
@@ -20,16 +20,14 @@
 %define so_ver -2_4-1
 %define _name glibmm
 Name:           glibmm2_4
-Version:        2.52.1
+Version:        2.56.0
 Release:        0
 Summary:        C++ Interface for Glib
 License:        LGPL-2.1-or-later
 Group:          Development/Libraries/C and C++
 URL:            http://www.gtkmm.org/
-Source0:        http://download.gnome.org/sources/glibmm/2.52/%{_name}-%{version}.tar.xz
+Source0:        http://download.gnome.org/sources/glibmm/2.56/%{_name}-%{version}.tar.xz
 Source99:       baselibs.conf
-# PATCH-FIX-UPSTREAM gcc8.patch schwab@suse.de -- Add missing address operator, fixes build wity GCC 8.
-Patch0:         gcc8.patch
 BuildRequires:  fdupes
 BuildRequires:  gcc-c++
 BuildRequires:  pkgconfig
@@ -86,7 +84,6 @@ C++ and makes it possible for gtkmm to wrap GObject-based APIs.
 
 %prep
 %setup -q -n %{_name}-%{version}
-%patch0 -p1
 
 %build
 %configure --disable-static