diff --git a/.gitignore b/.gitignore
index 6955502..d3e4ca4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -254,3 +254,5 @@ thunderbird-langpacks-3.1.2-20100803.tar.bz2
 /thunderbird-langpacks-78.8.0-20210222.tar.xz
 /thunderbird-78.11.0.source.tar.xz
 /thunderbird-langpacks-78.11.0-20210531.tar.xz
+/thunderbird-langpacks-78.12.0-20210708.tar.xz
+/thunderbird-78.12.0.source.tar.xz
diff --git a/sources b/sources
index b8de2ff..0c80e37 100644
--- a/sources
+++ b/sources
@@ -8,5 +8,5 @@ SHA512 (nspr-4.25.0-1.el8_0.src.rpm) = 7e39e4484b0d504e1b7f1253d7dc1f9f0d45705fb
 SHA512 (cbindgen-vendor-0.14.3.tar.xz) = 33c8d28547674121f690eea0d3ebac33926a39caacac787bf8ed8b346478822e74da5a4a1f57ab4df4105fa8376739a2ece888845a85bc5712aaed20e4a508bc
 SHA512 (nss-3.53.1-3.fc32.src.rpm) = 368849487aa8f9d602c9e5d9d7c88ebd03318aece12470283ff31744ef9eed27ef1e32031378a5a673bb06a9ebbcf5542afa13f3ad465409449c218922189acb
 SHA512 (nodejs-10.21.0-5.fc32.src.rpm) = 4d0c212a2609dc10e242a96f63baa8babb91e8aa6696f66f627c562c1ba30cb3632ed01991c98f48b5942fc7fd89ee34b350f41de901339b49a2c19e979593a7
-SHA512 (thunderbird-78.11.0.source.tar.xz) = c669439ae671a0a589f69902cced5685b8bab346c0ca3eeabd58d0449af338fb7a7a9189d6c2ef784f660c32278fee70766169d91293447eedef2e18a84f116a
-SHA512 (thunderbird-langpacks-78.11.0-20210531.tar.xz) = c5f08bbed351890e00bdce694560edad442c938a2782d8fadc15ce596f77ca11bbb33776fa77b3fd59a2040fbe904ac5227a2681a198a50f9e838dad9e87b464
+SHA512 (thunderbird-langpacks-78.12.0-20210708.tar.xz) = 89ef31bf7aa0219eaff887595e1e2d2d3b9daeba036836d8c09017f0a361de1666d251ad54332923b5382bdaf34d248c29a919b3271d5cf49080185a51ed5a77
+SHA512 (thunderbird-78.12.0.source.tar.xz) = 6cc80d0486edb04a8513748bc52c27d7b6b50e635eca24fa7ba9d1a71af900ae4d4cb51948e9c100e42b51e07c88a5209ae8ba53f0763b0c9dd0ecf8ddc4a35b
diff --git a/thunderbird.spec b/thunderbird.spec
index bcfe388..d6302a6 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -177,8 +177,8 @@ end}
 %global build_langpacks         1
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        78.11.0
-Release:        2%{?dist}
+Version:        78.12.0
+Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Group:          Applications/Internet
@@ -190,7 +190,7 @@ ExcludeArch:    s390 ppc
 # From ftp://archive.mozilla.org/pub/thunderbird/releases/%{version}%{?ext_version}/source
 Source0:        https://archive.mozilla.org/pub/thunderbird/releases/%{version}%{?pre_version}/source/thunderbird-%{version}%{?pre_version}.source.tar.xz
 %if %{build_langpacks}
-Source1:        thunderbird-langpacks-%{version}%{?ext_version}-20210531.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?ext_version}-20210708.tar.xz
 # Locales for lightning
 %endif
 Source2:        cbindgen-vendor-0.14.3.tar.xz
@@ -1310,6 +1310,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Thu Jul 08 2021 Eike Rathke <erack@redhat.com> - 78.12.0-1
+- Update to 78.12.0 build1
+
 * Wed Jun 30 2021 Jan Horak <jhorak@redhat.com> - 78.11.0-2
 - Added bundled libraries, update to 78.11