diff --git a/.gitignore b/.gitignore
index b9f5d67..b279dd8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -181,3 +181,5 @@
 /thunderbird-140.7.0esr.processed-source.tar.xz
 /thunderbird-140.8.0esr.processed-source.tar.xz
 /thunderbird-langpacks-140.8.0esr-20260223.tar.xz
+/thunderbird-140.9.0esr.processed-source.tar.xz
+/thunderbird-langpacks-140.9.0esr-20260323.tar.xz
diff --git a/sources b/sources
index f8c7c7a..30ca87e 100644
--- a/sources
+++ b/sources
@@ -2,5 +2,5 @@ SHA512 (nss-3.112.0-1.el9_4.src.rpm) = 6386239e79f8095b05270b3c8b76ac9203b0df196
 SHA512 (cbindgen-vendor.tar.xz) = 2b8db32c0bca2fa27304ee4fd3a5cc38bc43a11500b23842747813d221e55719c51cf4c0e027e41857f58ce1e283ce97b69c2c7d1eae93ecbb08c2f729e2bf55
 SHA512 (nss-3.112.0-4.el8_2.src.rpm) = 59cca3df7a0ec6a731f4a36f8f560d496d240da0c16650f047ae686e683b883dc2630aedbe46a8b2cb21662c15f03f1efbe99da42055cc3a5418da4839e28da2
 SHA512 (nspr-4.36.0-2.el8_2.src.rpm) = fcc720afd2453a5110975fac9dd06f636491234780b62cbfcc235a485b4935e97c4f438292c686d27d9dc86b56f43399c024bee4fffcdff5f27c62d105310645
-SHA512 (thunderbird-140.8.0esr.processed-source.tar.xz) = 88a4a99a8f9ade31bc2b6badfd6254cbfa8d9febe9503249783389f25357b68c3827444983b0afefc26edba97ab3b1e61a11b57235d2c5b8e20b70219f203524
-SHA512 (thunderbird-langpacks-140.8.0esr-20260223.tar.xz) = cf8ed03feb3d9e0280087c710e19adbb06671d18706e0e699a444868e6476891a577202fda06575cb904004c66db1ade1ea7760906c9efcb71499f99ba93fd62
+SHA512 (thunderbird-140.9.0esr.processed-source.tar.xz) = 6e4386804f9fa593def5611aefd827b35e5163c03d064ad33ce6042ea5bbf50e77f645254224e0a9f2f8bbf7b3bfad65244c41dd103b95d6732174061fedf340
+SHA512 (thunderbird-langpacks-140.9.0esr-20260323.tar.xz) = 8beeaf30a39b18b77c8dfe2341aade6cdbc84408fd1f8c63d085b5e47c1896b7f2d56ce55ca2d4165580a8ca6bdb901b12dc179ffa86e62b8d8cab34ddccdd8a
diff --git a/thunderbird.spec b/thunderbird.spec
index 72c3e60..eb2d87e 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -137,7 +137,7 @@ end}
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        140.8.0
+Version:        140.9.0
 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}-20260223.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?pre_version}-20260323.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -1717,6 +1717,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Mon Mar 23 2026 Jan Horak <jhorak@redhat.com> - 140.9.0-1
+- Update to 140.9.0 ESR
+
 * Mon Feb 23 2026 Jan Horak <jhorak@redhat.com> - 140.8.0-1
 - Update to 140.8.0 ESR