diff --git a/glibmm-2.66.5.tar.xz b/glibmm-2.66.5.tar.xz
deleted file mode 100644
index 7354fbc..0000000
--- a/glibmm-2.66.5.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:7b384662dd6ec3b86c0570331d32af05db2bd99a791602b767b4a0b2566ec149
-size 7610516
diff --git a/glibmm-2.66.6.tar.xz b/glibmm-2.66.6.tar.xz
new file mode 100644
index 0000000..7c5fb0d
--- /dev/null
+++ b/glibmm-2.66.6.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:5358742598181e5351d7bf8da072bf93e6dd5f178d27640d4e462bc8f14e152f
+size 8668828
diff --git a/glibmm2_4.changes b/glibmm2_4.changes
index d0249a2..0555079 100644
--- a/glibmm2_4.changes
+++ b/glibmm2_4.changes
@@ -1,3 +1,16 @@
+-------------------------------------------------------------------
+Fri Mar 17 12:28:50 UTC 2023 - Bjørn Lie <bjorn.lie@gmail.com>
+
+- Update to version 2.66.6:
+  + Glib: Dispatcher: Don't warn when a Dispatcher is deleted while
+    messages are pending.
+  + Gio: NetworkMonitor::get_default(): Add refreturn.
+  + gmmproc: generate_wrap_init.pl.in: Disable warning C4273 on
+    Visual Studio.
+  + Meson build:
+    - Detect if we build from a git subtree.
+    - Don't copy files with configure_file().
+
 -------------------------------------------------------------------
 Mon Sep 19 09:45:49 UTC 2022 - Bjørn Lie <bjorn.lie@gmail.com>
 
diff --git a/glibmm2_4.spec b/glibmm2_4.spec
index d761be7..81e2215 100644
--- a/glibmm2_4.spec
+++ b/glibmm2_4.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package glibmm2_4
 #
-# Copyright (c) 2022 SUSE LLC
+# Copyright (c) 2023 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -20,7 +20,7 @@
 %define so_ver -2_4-1
 %define _name glibmm
 Name:           glibmm2_4
-Version:        2.66.5
+Version:        2.66.6
 Release:        0
 Summary:        C++ Interface for Glib
 License:        LGPL-2.1-or-later