diff --git a/.gitignore b/.gitignore
index 1f85e8d..68d0f24 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,5 @@ SOURCES/cbindgen-vendor.tar.xz
 SOURCES/nspr-4.36.0-2.el8_2.src.rpm
 SOURCES/nss-3.112.0-1.el9_4.src.rpm
 SOURCES/nss-3.112.0-4.el8_2.src.rpm
-SOURCES/thunderbird-140.11.0esr.processed-source.tar.xz
-SOURCES/thunderbird-langpacks-140.11.0esr-20260521.tar.xz
+SOURCES/thunderbird-140.12.0esr.processed-source.tar.xz
+SOURCES/thunderbird-langpacks-140.12.0esr-20260615.tar.xz
diff --git a/.thunderbird.metadata b/.thunderbird.metadata
index b36c0b5..405a39c 100644
--- a/.thunderbird.metadata
+++ b/.thunderbird.metadata
@@ -2,5 +2,5 @@ bc4adac8f38f5103d8f88564a1545063dd8d6402 SOURCES/cbindgen-vendor.tar.xz
 0d0ddbd2a73340b3cbc977997f57222946b1e775 SOURCES/nspr-4.36.0-2.el8_2.src.rpm
 fd3879b176634d66f8ef64d18fdaeec98e140c23 SOURCES/nss-3.112.0-1.el9_4.src.rpm
 c3f0aaef37972107442e2796efad71be3a98ce3c SOURCES/nss-3.112.0-4.el8_2.src.rpm
-f3dbcf290254def69d97fae18e72f39ebd5b4503 SOURCES/thunderbird-140.11.0esr.processed-source.tar.xz
-65e3db9ef84de6a0451f1c460dc219cbf5097733 SOURCES/thunderbird-langpacks-140.11.0esr-20260521.tar.xz
+bac9da3993145ee5b8f6c67d8bb00cf3b8fd38a6 SOURCES/thunderbird-140.12.0esr.processed-source.tar.xz
+7569b6c73154365395dd788ed263e1e95efe9591 SOURCES/thunderbird-langpacks-140.12.0esr-20260615.tar.xz
diff --git a/SPECS/thunderbird.spec b/SPECS/thunderbird.spec
index 1ddc278..e547ba7 100644
--- a/SPECS/thunderbird.spec
+++ b/SPECS/thunderbird.spec
@@ -137,7 +137,7 @@ end}
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        140.11.0
+Version:        140.12.0
 Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
@@ -165,7 +165,7 @@ 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}-20260521.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?pre_version}-20260615.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -1723,6 +1723,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Mon Jun 15 2026 Jan Horak <jhorak@redhat.com> - 140.12.0-1
+- Update to 140.12.0 ESR
+
 * Thu May 21 2026 Jan Horak <jhorak@redhat.com> - 140.11.0-1
 - Update to 140.11.0 ESR