diff --git a/.gitignore b/.gitignore
index 958f5d7..15b5519 100644
--- a/.gitignore
+++ b/.gitignore
@@ -130,3 +130,5 @@
 /nss-3.101.0-7.el8_2.src.rpm
 /thunderbird-128.3.1esr.processed-source.tar.xz
 /thunderbird-langpacks-128.3.1esr-20241009.tar.xz
+/thunderbird-128.4.0esr.processed-source.tar.xz
+/thunderbird-langpacks-128.4.0esr-20241028.tar.xz
diff --git a/sources b/sources
index 7512f11..25b916a 100644
--- a/sources
+++ b/sources
@@ -2,5 +2,5 @@ SHA512 (nspr-4.35.0-1.el8_1.src.rpm) = 5123a443fcc42602e31104999be339ae899eb7b1f
 SHA512 (cbindgen-vendor.tar.xz) = 0c7a40033ccd38dadd30ad064feef390444af4562be07d3dfd0c4cccc55821b01b5228ddee367d0af3bd1b4ef9b1552cdd104506579b020ac1940a7c536b8b68
 SHA512 (nss-3.101.0-7.el9_2.src.rpm) = 7c325e0e437c1266031af02b3a026d20b789548ae435be6c39d710aa9d19c967ac0a79097fd50dd8ab878bf0d72c19e937d54863aa8cd0654ef2ef288e3102ec
 SHA512 (nss-3.101.0-7.el8_2.src.rpm) = c25551b06cf9239bb54aaf3edaea2c60804b449de4e06af4f5192bc181b5c6468ea8a69ddeff9de1b11bfc123e894b1ce8fc5d6deddfd5062f8736b75db56f8d
-SHA512 (thunderbird-128.3.1esr.processed-source.tar.xz) = 5d2b72e2d5d9713d1dd3789c73ac1c0a5fb3d7c540599475469216bf1c34fdae12bbea13f68e05562139c262df46ef482b0fce6ccf08bf2757e36982b95a53dd
-SHA512 (thunderbird-langpacks-128.3.1esr-20241009.tar.xz) = 978ad8d3e847a78915a67ca381c4f821d3150aa385eca811a5abd999805da22b85633ffe1885301cce8cd7dc6d09d1c0d26e666e9f3db90cb7c4a14e63b5a8bb
+SHA512 (thunderbird-128.4.0esr.processed-source.tar.xz) = b1e3775f2fb0f2cfb031e90c9f83ffff6e78a62305a60ab778a294a63ead9444d5e0ff14456876ea9dc4ecd5c44236617c3cd95ab75e0ad407c81f68cd5c0595
+SHA512 (thunderbird-langpacks-128.4.0esr-20241028.tar.xz) = 42defe09760ea873a44f59301eaa24f588287266e0abd21bcabf094e8f7876f3d2792bf2ba1a7cb44e434d78c8c21e3254e733628eb33dcd0d99a17fea4f1593
diff --git a/thunderbird.spec b/thunderbird.spec
index 79d4010..20fad02 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -131,7 +131,7 @@ end}
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        128.3.1
+Version:        128.4.0
 Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
@@ -159,7 +159,7 @@ ExcludeArch:    %{ix86}
 #Source0:        https://archive.mozilla.org/pub/thunderbird/releases/%%{version}%%{?pre_version}/source/thunderbird-%%{version}%%{?pre_version}.processed-source.tar.xz
 Source0:        thunderbird-%{version}%{?pre_version}%{?buildnum}.processed-source.tar.xz
 %if %{with langpacks}
-Source1:        thunderbird-langpacks-%{version}%{?pre_version}-20241009.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?pre_version}-20241028.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -1634,6 +1634,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Mon Oct 28 2024 Eike Rathke <erack@redhat.com> - 128.4.0-1
+- Update to 128.4.0 build1
+
 * Wed Oct 09 2024 Eike Rathke <erack@redhat.com> - 128.3.1-1
 - Update to 128.3.1