diff --git a/.gitignore b/.gitignore
index 669a386..ab95805 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,6 +6,6 @@ SOURCES/nodejs-10.21.0-5.fc32.src.rpm
 SOURCES/nspr-4.25.0-1.el8_0.src.rpm
 SOURCES/nss-3.53.1-3.fc32.src.rpm
 SOURCES/openssl-1.0.2k-19.6.bundle.el7_7.src.rpm
-SOURCES/thunderbird-78.10.0.source.tar.xz
-SOURCES/thunderbird-langpacks-78.10.0-20210421.tar.xz
+SOURCES/thunderbird-78.11.0.source.tar.xz
+SOURCES/thunderbird-langpacks-78.11.0-20210531.tar.xz
 SOURCES/yasm-1.2.0-3.el5.src.rpm
diff --git a/.thunderbird.metadata b/.thunderbird.metadata
index 50575fa..c84be99 100644
--- a/.thunderbird.metadata
+++ b/.thunderbird.metadata
@@ -6,6 +6,6 @@ e188ab1a444697bc649e223c28389d82ca94c472 SOURCES/libffi-3.0.13-18.el7_3.src.rpm
 07d67c90367c3ec0d6cebc1a5793c21076d34b78 SOURCES/nspr-4.25.0-1.el8_0.src.rpm
 223c02166b1cb9863b9f453ef687d7805a93e7af SOURCES/nss-3.53.1-3.fc32.src.rpm
 a379070abf5000cde61411c97af7e733b267a4d3 SOURCES/openssl-1.0.2k-19.6.bundle.el7_7.src.rpm
-4485a2f5eff0ff87b77adcf175c4a920a7cf54d2 SOURCES/thunderbird-78.10.0.source.tar.xz
-a6e69d9f51eef3128fbb03125a271f566d17735a SOURCES/thunderbird-langpacks-78.10.0-20210421.tar.xz
+19b6827a233ae88488a7de4e9f988610cccca9ea SOURCES/thunderbird-78.11.0.source.tar.xz
+e12ad30bdf8288817f0b61c3d6322d57086cf161 SOURCES/thunderbird-langpacks-78.11.0-20210531.tar.xz
 77fd30f7ebc12a629a31c1e252cec06af55a71fe SOURCES/yasm-1.2.0-3.el5.src.rpm
diff --git a/SPECS/thunderbird.spec b/SPECS/thunderbird.spec
index ba1193e..9b17366 100644
--- a/SPECS/thunderbird.spec
+++ b/SPECS/thunderbird.spec
@@ -11,6 +11,9 @@
 %global rhel_minor_version 4
 %endif
 %if "%{?dist}" == ".el8"
+%global rhel_minor_version 5
+%endif
+%if "%{?dist}" == ".el8_4"
 %global rhel_minor_version 4
 %endif
 %if "%{?dist}" == ".el8_3"
@@ -194,7 +197,7 @@
 %global build_langpacks         1
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        78.10.0
+Version:        78.11.0
 Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
@@ -210,7 +213,7 @@ ExclusiveArch:  i686 x86_64 ppc64 s390x
 # 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}-20210421.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?ext_version}-20210531.tar.xz
 # Locales for lightning
 %endif
 Source2:        cbindgen-vendor-0.14.3.tar.xz
@@ -1457,6 +1460,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Mon May 31 2021 Eike Rathke <erack@redhat.com> - 78.11.0-1
+- Update to 78.11.0 build1
+
 * Wed Apr 21 2021 Eike Rathke <erack@redhat.com> - 78.10.0-1
 - Update to 78.10.0