diff --git a/icu-76.patch b/icu-76.patch
new file mode 100644
index 0000000000000000000000000000000000000000..6a94fa633dd32910eee8efc8fb0595b775515df8
--- /dev/null
+++ b/icu-76.patch
@@ -0,0 +1,11 @@
+--- thunderbird-128.12.0/js/moz.configure.orig	2025-07-06 12:09:10.637465000 +0800
++++ thunderbird-128.12.0/js/moz.configure	2025-07-06 12:09:30.917088400 +0800
+@@ -1305,7 +1305,7 @@
+     return enable_system_icu
+ 
+ 
+-system_icu = pkg_check_modules("MOZ_ICU", "icu-i18n >= 73.1", when="--with-system-icu")
++system_icu = pkg_check_modules("MOZ_ICU", "icu-i18n >= 73.1 icu-uc >= 73.1", when="--with-system-icu")
+ 
+ 
+ @depends(enable_system_icu_option)
diff --git a/thunderbird-128.11.1esr.source.tar.xz b/thunderbird-128.12.0esr.source.tar.xz
similarity index 32%
rename from thunderbird-128.11.1esr.source.tar.xz
rename to thunderbird-128.12.0esr.source.tar.xz
index 6ce8ccab3e5014472ebcb9b506036cd94c84692a..a9dda93dc14152cded345330281dad82f1f77599 100644
--- a/thunderbird-128.11.1esr.source.tar.xz
+++ b/thunderbird-128.12.0esr.source.tar.xz
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:0d3cdfcf7c2f7d262e6abb2d39e43f183fa6cc07c7cb0b4c2ebef349f2f4d946
-size 676156916
+oid sha256:f4232c8b4285d932d779fec90169b2a7008070a214571cf0fce0a68315ae7423
+size 681085772
diff --git a/thunderbird-langpacks-128.11.1esr-20250611.tar.xz b/thunderbird-langpacks-128.12.0esr-20250630.tar.xz
similarity index 32%
rename from thunderbird-langpacks-128.11.1esr-20250611.tar.xz
rename to thunderbird-langpacks-128.12.0esr-20250630.tar.xz
index 32b8f61ba2d56766e11f15947a139379d6c1fe71..b3edeba1d132da6b28f4347ea487272f832d42f7 100644
--- a/thunderbird-langpacks-128.11.1esr-20250611.tar.xz
+++ b/thunderbird-langpacks-128.12.0esr-20250630.tar.xz
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:0c027d463496f766089d94f146c02fffc63aa5bb4139f4b852d62ce4e69fe07a
-size 42048664
+oid sha256:fe0607fa57da35b1b2bdf2a30c790ad8e63989129ff9ef5783d75b8fab347fda
+size 42375456
diff --git a/thunderbird-mozconfig b/thunderbird-mozconfig
index 3b3b26fb5791dcc04f2ae2bda883a4640061a630..f4a5a232e1a2665b6ac7b509c447e482bb4118cb 100644
--- a/thunderbird-mozconfig
+++ b/thunderbird-mozconfig
@@ -28,6 +28,7 @@ ac_add_options --without-sysroot
 #ac_add_options --libdir="$LIBDIR"
 ac_add_options --with-system-jpeg
 ac_add_options --with-system-zlib
+ac_add_options --with-system-bz2
 #ac_add_options --with-system-libvpx
 #ac_add_options --disable-tests
 #ac_add_options --disable-strip
diff --git a/thunderbird.spec b/thunderbird.spec
index fb0bb91190b7b6668ee85e057cacb04b910d7c42..2f607db08215863fdc128946826fbdd6c8ea564e 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -59,13 +59,13 @@
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        128.11.1
+Version:        128.12.0
 Release:        1
 URL:            https://www.mozilla.org/projects/thunderbird/
-License:        MPLv1.1 or GPLv2+ or LGPLv2+
+License:        MPL-2.0 OR GPL-2.0-or-later OR LGPL-2.0-or-later
 Source0:        https://ftp.mozilla.org/pub/thunderbird/releases/%{version}esr/source/thunderbird-%{version}esr.source.tar.xz
 %if %{build_langpacks}
-Source1:        %{name}-langpacks-%{version}esr-20250611.tar.xz
+Source1:        %{name}-langpacks-%{version}esr-20250630.tar.xz
 %endif
 Source3:        get-calendar-langpacks.sh
 Source4:        cbindgen-vendor.tar.xz
@@ -83,6 +83,7 @@ Source32:       node-stdout-nonblocking-wrapper
 
 # Build patches
 Patch0:         build-aarch64-skia.patch
+Patch1:         icu-76.patch
 
 # gcc 12 build fix patches
 Patch422:       0001-GLIBCXX-fix-for-GCC-12.patch
@@ -215,6 +216,7 @@ debug %{name}, you want to install %{name}-debuginfo instead.
 
 # Build patches
 %patch -P 0   -p1 -b .build-aarch64-skia
+%patch -P 1   -p1 -b .icu
 
 %patch -P 402 -p1 -b .526293
 %patch -P 406 -p1 -b .1170092-etc-conf
@@ -568,6 +570,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Sun Jul 06 2025 Funda Wang <fundawang@yeah.net> - 128.12.0-1
+- update to 128.12.0
+
 * Sat Jun 14 2025 Funda Wang <fundawang@yeah.net> - 128.11.1-1
 - update to 128.11.1