diff --git a/.gitignore b/.gitignore
index 6549c87..3d6f9ff 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,5 @@ SOURCES/cbindgen-vendor.tar.xz
 SOURCES/nspr-4.35.0-1.el8_1.src.rpm
 SOURCES/nss-3.90.0-2.el8_1.src.rpm
 SOURCES/nss-3.90.0-3.el9_0.src.rpm
-SOURCES/thunderbird-115.9.0.processed-source.tar.xz
-SOURCES/thunderbird-langpacks-115.9.0-20240318.tar.xz
+SOURCES/thunderbird-115.10.0.b2.processed-source.tar.xz
+SOURCES/thunderbird-langpacks-115.10.0-20240415.tar.xz
diff --git a/.thunderbird.metadata b/.thunderbird.metadata
index f22e391..5383b68 100644
--- a/.thunderbird.metadata
+++ b/.thunderbird.metadata
@@ -2,5 +2,5 @@ b963b16f6879c5dbe6e33a3a3da058b494453922 SOURCES/cbindgen-vendor.tar.xz
 d744f92e874688cc4b5376477dfdd639a97a6cd4 SOURCES/nspr-4.35.0-1.el8_1.src.rpm
 39d1004f8948186cdaa33bbb90423f6f994bdf6c SOURCES/nss-3.90.0-2.el8_1.src.rpm
 df0dd588680f6ade6728a1fd3ff2d71e7a46255d SOURCES/nss-3.90.0-3.el9_0.src.rpm
-cb287fa47bd8bdff66aacb2143a3c244250bae88 SOURCES/thunderbird-115.9.0.processed-source.tar.xz
-12f6297fbc364c63712e13e30d289b37840a865f SOURCES/thunderbird-langpacks-115.9.0-20240318.tar.xz
+56522a0800e27a5ecee0212ad55d3768bf8a7e32 SOURCES/thunderbird-115.10.0.b2.processed-source.tar.xz
+09f9395ac550f9f6974ac2f3ac5d5635b7eeab16 SOURCES/thunderbird-langpacks-115.10.0-20240415.tar.xz
diff --git a/SPECS/thunderbird.spec b/SPECS/thunderbird.spec
index 522642a..46cfacf 100644
--- a/SPECS/thunderbird.spec
+++ b/SPECS/thunderbird.spec
@@ -124,7 +124,7 @@ end}
 # If set to .b2 or .b3 ... the processed source file needs to be renamed before upload, e.g.
 # thunderbird-102.8.0.b2.processed-source.tar.xz
 # When unset use processed source file name as is.
-##global buildnum             .b2
+%global buildnum             .b2
 
 %bcond_without langpacks
 
@@ -134,8 +134,8 @@ end}
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        115.9.0
-Release:        1%{?dist}.alma.1
+Version:        115.10.0
+Release:        2%{?dist}.alma.1
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 
@@ -165,7 +165,7 @@ ExcludeArch:    aarch64 s390 ppc ppc64
 #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}-20240318.tar.xz
+Source1:        thunderbird-langpacks-%{version}-20240415.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -220,7 +220,6 @@ Patch155:       rhbz-1354671.patch
 
 # ---- Security patches ----
 Patch301:       CVE-2023-44488-libvpx.patch
-Patch302:       expat-CVE-2023-52425.patch
 
 # BUILD REQURES/REQUIRES
 %if %{?system_nss} && !0%{?bundle_nss}
@@ -961,7 +960,6 @@ echo "--------------------------------------------"
 cd media/libvpx/libvpx
 %patch -P301 -p1 -b .CVE-2023-44488-libvpx
 cd -
-%patch -P302 -p1 -b .expat-CVE-2023-52425
 
 %{__rm} -f .mozconfig
 %{__cp} %{SOURCE10} .mozconfig
@@ -1519,6 +1517,10 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Wed Apr 24 2024 Eduard Abdullin <eabdullin@almalinux.org> - 115.10.0-2.alma.1
+- Revert expat CVE-2023-52425
+- Update 115.10.0.b2
+
 * Tue Apr 02 2024 Eduard Abdullin <eabdullin@almalinux.org> - 115.9.0-1.alma.1
 - Debrand for AlmaLinux