diff --git a/.gitignore b/.gitignore
index 4dcb086..5c3faab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -88,3 +88,5 @@
 /thunderbird-115.4.0.b2.processed-source.tar.xz
 /thunderbird-langpacks-115.4.0-20231024.tar.xz
 /thunderbird-115.4.0.b3.processed-source.tar.xz
+/thunderbird-115.4.1.processed-source.tar.xz
+/thunderbird-langpacks-115.4.1-20231025.tar.xz
diff --git a/sources b/sources
index e618129..4e10f7e 100644
--- a/sources
+++ b/sources
@@ -2,5 +2,5 @@ SHA512 (cbindgen-vendor.tar.xz) = 161811f4adfc74e5d92871c78139704d32e1e1ad6b615c
 SHA512 (nspr-4.35.0-1.el8_1.src.rpm) = 5123a443fcc42602e31104999be339ae899eb7b1f1e2f1ea87ba4f283eb894d08ab568e421dba1df4770f23be91ff88aa6a0748bce7feef31ed88bee5bdecb2c
 SHA512 (nss-3.90.0-2.el8_1.src.rpm) = 850cd6a343e62d34ad28ac356db03371f0b1f018274901cc700cc4f8138c9929eb159bbb1ebe167f727a69f6499423a54581ca65ed655ee468f1cae8450df85c
 SHA512 (nss-3.90.0-3.el9_0.src.rpm) = f321b9c1bda0b09eee564e2903023435851a4ff2e55bdd5b03012ca51be7999b18d85061f874065d0b25913721eb574f49746a3111f8f1cdd5b21268dddd8367
-SHA512 (thunderbird-langpacks-115.4.0-20231024.tar.xz) = 69d11bf359d912519c0a62888089cabaa613c908b0e9ce27de0b8195532d5a097c60e6ac70a552c63e47797fe5acd47fc7df87486ee0ae90cfec9d291cd74ed3
-SHA512 (thunderbird-115.4.0.b3.processed-source.tar.xz) = ac9da00f462d6387b03154c8ca04ffdf4998cd17b3ad220fd45adcaeac4956a7a4a97b219397d98fff2cdf2a6fea73715f02a65e74fc3d77fefa81753af000af
+SHA512 (thunderbird-115.4.1.processed-source.tar.xz) = be7225aa0a2b220b94d31085162771072bf0e5763a172be8e2cbb3b67e2ee7ff08e4ab429924265facac19bd2f39519ef9eb1a0ed5eb5a2865bf480d830b081a
+SHA512 (thunderbird-langpacks-115.4.1-20231025.tar.xz) = 91ce1acb66bcad9be18c4ccfe0a7085abecffe78399a2c18e724e1b9e49e32846266b4aea764062bc893da631b3bea8e7dc9d9ebf40f88dfa9c6af2b21ab753d
diff --git a/thunderbird.spec b/thunderbird.spec
index e3fb2ef..1d51290 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -125,7 +125,6 @@ end}
 # thunderbird-102.8.0.b2.processed-source.tar.xz
 # When unset use processed source file name as is.
 ##global buildnum             .b2
-%global buildnum             .b3
 
 %bcond_without langpacks
 
@@ -135,8 +134,8 @@ end}
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        115.4.0
-Release:        3%{?dist}
+Version:        115.4.1
+Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 
@@ -161,7 +160,7 @@ ExcludeArch:    aarch64 s390 ppc
 #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}-20231024.tar.xz
+Source1:        thunderbird-langpacks-%{version}-20231025.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -1503,6 +1502,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Wed Oct 25 2023 Eike Rathke <erack@redhat.com> - 115.4.1-1
+- Update to 115.4.1 build1
+
 * Tue Oct 24 2023 Anton Bobrov <abobrov@redhat.com> - 115.4.0-3
 - Update to 115.4.0 build3