diff --git a/.gitignore b/.gitignore
index 0ced448..ec1b83e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -148,3 +148,5 @@
 /thunderbird-langpacks-128.9.0esr-20250326.tar.xz
 /thunderbird-128.9.2esr.processed-source.tar.xz
 /thunderbird-langpacks-128.9.2esr-20250416.tar.xz
+/thunderbird-128.10.0esr.processed-source.tar.xz
+/thunderbird-langpacks-128.10.0esr-20250428.tar.xz
diff --git a/sources b/sources
index 84e3e82..161399f 100644
--- a/sources
+++ b/sources
@@ -2,5 +2,5 @@ SHA512 (nspr-4.35.0-1.el8_1.src.rpm) = 5123a443fcc42602e31104999be339ae899eb7b1f
 SHA512 (cbindgen-vendor.tar.xz) = 0c7a40033ccd38dadd30ad064feef390444af4562be07d3dfd0c4cccc55821b01b5228ddee367d0af3bd1b4ef9b1552cdd104506579b020ac1940a7c536b8b68
 SHA512 (nss-3.101.0-7.el9_2.src.rpm) = 7c325e0e437c1266031af02b3a026d20b789548ae435be6c39d710aa9d19c967ac0a79097fd50dd8ab878bf0d72c19e937d54863aa8cd0654ef2ef288e3102ec
 SHA512 (nss-3.101.0-7.el8_2.src.rpm) = c25551b06cf9239bb54aaf3edaea2c60804b449de4e06af4f5192bc181b5c6468ea8a69ddeff9de1b11bfc123e894b1ce8fc5d6deddfd5062f8736b75db56f8d
-SHA512 (thunderbird-128.9.2esr.processed-source.tar.xz) = 5c5ec9d5820ec049775c8918d798fc55ca8f1ac822061adfc539be8848f265350ac3464e001620aeafc8ad74fa214a466e1e8f36adef77da4e6166c05f6d3cf7
-SHA512 (thunderbird-langpacks-128.9.2esr-20250416.tar.xz) = e187b3f96dd7fadd35bc2e656e3c2550d1d030395ebf38fc4a110aa57292c78f7c1b31492f8d5e8073e512b08118e69852f671cd443311ea2ad0c11c22b45b20
+SHA512 (thunderbird-128.10.0esr.processed-source.tar.xz) = e1c886a2992a4f5c807e707383a6d88b3fa36b233c9d6f0db3f051953ab38f4bfd012648f46333fa0a7fe45672e3ac558038c230d1c963b13093d0cc5e5cbe07
+SHA512 (thunderbird-langpacks-128.10.0esr-20250428.tar.xz) = 12e5b4a619d9a08e38fb0de77d2a9ba6ca96cb4fd22529e313d09030e8c5498c00cded08b66dd7bc78789912b9e7d5865bbea0297e6703613c99caaf4de0ae06
diff --git a/thunderbird.spec b/thunderbird.spec
index e10cac0..56b49ad 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -35,7 +35,7 @@ function dist_to_rhel_minor(str, start)
   end
   match = string.match(str, ".el9")
   if match then
-     return 6
+     return 7
   end
   match = string.match(str, ".el10_%d+")
   if match then
@@ -43,7 +43,7 @@ function dist_to_rhel_minor(str, start)
   end
   match = string.match(str, ".el10")
   if match then
-     return 0
+     return 1
   end
   return -1
 end}
@@ -137,7 +137,7 @@ end}
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        128.9.2
+Version:        128.10.0
 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}-20250416.tar.xz
+Source1:        thunderbird-langpacks-%{version}%{?pre_version}-20250428.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -1659,6 +1659,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Mon Apr 28 2025 Eike Rathke <erack@redhat.com> - 128.10.0-1
+- Update to 128.10.0 build1
+
 * Wed Apr 16 2025 Eike Rathke <erack@redhat.com> - 128.9.2-1
 - Update to 128.9.2