diff --git a/.gitignore b/.gitignore
index a732df8..3582b41 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-140.9.1esr.processed-source.tar.xz
-SOURCES/thunderbird-langpacks-140.9.1esr-20260409.tar.xz
+SOURCES/thunderbird-140.10.0esr.processed-source.tar.xz
+SOURCES/thunderbird-langpacks-140.10.0esr-20260421.tar.xz
diff --git a/.thunderbird.metadata b/.thunderbird.metadata
index a16c265..9399103 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
-75159f7d43bf4d117955ddaec4d0d4f4b1c2e07e SOURCES/thunderbird-140.9.1esr.processed-source.tar.xz
-4a4768adaedeb986823ce7c215ab28c8f672c8a8 SOURCES/thunderbird-langpacks-140.9.1esr-20260409.tar.xz
+011268756c4b0d3f630b8f159c9695dc46ea1543 SOURCES/thunderbird-140.10.0esr.processed-source.tar.xz
+8bcd06c1e017b9500c9256e7f7672bccb04fd4e7 SOURCES/thunderbird-langpacks-140.10.0esr-20260421.tar.xz
diff --git a/SPECS/thunderbird.spec b/SPECS/thunderbird.spec
index b7d2559..bc9f409 100644
--- a/SPECS/thunderbird.spec
+++ b/SPECS/thunderbird.spec
@@ -137,7 +137,7 @@ end}
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        140.9.1
+Version:        140.10.0
 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}-20260409.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?pre_version}-20260421.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -1720,6 +1720,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Tue Apr 21 2026 Jan Horak <jhorak@redhat.com> - 140.10.0-1
+- Update to 140.10.0 ESR
+
 * Thu Apr  9 2026 Jan Horak <jhorak@redhat.com> - 140.9.1-1
 - Update to 140.9.1 ESR