diff --git a/.gitignore b/.gitignore
index d6aadd8..307d81b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -284,3 +284,5 @@
 /firefox-91.4.0esr.processed-source.tar.xz
 /firefox-langpacks-91.4.0esr-20211201.tar.xz
 /nss-3.67.0-7.el8_1.src.rpm
+/firefox-91.5.0esr.processed-source.tar.xz
+/firefox-langpacks-91.5.0esr-20220106.tar.xz
diff --git a/firefox.spec b/firefox.spec
index 956d73f..7effe6f 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -128,8 +128,8 @@ end}
 
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
-Version:        91.4.0
-Release:        3%{?dist}
+Version:        91.5.0
+Release:        1%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 %if 0%{?rhel} == 9
@@ -149,7 +149,7 @@ ExcludeArch:    s390 ppc
 # Link to official tarball: https://hg.mozilla.org/releases/mozilla-release/archive/firefox-%%{version}%%{?pre_version}.source.tar.xz
 Source0:        firefox-%{version}%{?pre_version}.processed-source.tar.xz
 %if %{build_langpacks}
-Source1:        firefox-langpacks-%{version}%{?pre_version}-20211201.tar.xz
+Source1:        firefox-langpacks-%{version}%{?pre_version}-20220106.tar.xz
 %endif
 Source2:        cbindgen-vendor.tar.xz
 Source3:        process-official-tarball
@@ -1249,6 +1249,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Thu Jan 06 2022 Eike Rathke <erack@redhat.com> - 91.5.0-1
+- Update to 91.5.0 build1
+
 * Wed Dec 22 2021 Jan Horak <jhorak@redhat.com> - 91.4.0-3
 - Enable optimalization on s390x
 
diff --git a/sources b/sources
index 254e4e8..ebe87a8 100644
--- a/sources
+++ b/sources
@@ -1,5 +1,5 @@
 SHA512 (cbindgen-vendor.tar.xz) = 9cb4a590584c53386a14deb1f1faf7b67ff8f312eff4a8dccab710738183c504387d69fa660021b495ed61603f4df1db689f35234c61e2e886962e40aab20c95
 SHA512 (nss-3.67.0-7.el8_1.src.rpm) = 15361c596fc4f2e4afc7d40d48c37886cad93849821d2bcad8213f34035a6951be127b436b6799083f2b4adb18a68870dbe273177d2d670eda9cc9680e6d6f63
 SHA512 (nspr-4.32.0-1.el8_1.src.rpm) = c181a19bc24aeb62aed1745a6a43ae8aa2ee0d903aa16cb6ec7d385286e60f6426049cc9669459434377a215f329502ffe6fc48a1edc52d5b3283ebc259e9dca
-SHA512 (firefox-91.4.0esr.processed-source.tar.xz) = 2b90ca7bef38baf54919a6838bb668c229357dbb2180aad5f709c126d85b353448358712e1c968df5f0131838ec887b33e302c57d13f18d11ba48f497eb79bf2
-SHA512 (firefox-langpacks-91.4.0esr-20211201.tar.xz) = d03190d585d5195f6ed17b0fd4e993ac375956961bba63f11621936341b2c36e543ee679a96cfb71fb0e8a508549326e279b6ea8edac9bae8fe3371cdf314ac7
+SHA512 (firefox-91.5.0esr.processed-source.tar.xz) = 9c4dd3e7adbfa7c54791c683704551300a8d36bd0ec799877715d77069a6d78d8d9134af11f72b9318ddb938296a17dc8c28c2b7ab72fc101187c5642869098f
+SHA512 (firefox-langpacks-91.5.0esr-20220106.tar.xz) = 862035a49e8e1aae25edd6fab7e997a2a98773718f79bfabae27d0347f95d020366ef0fcceaaf9db8413607b33a4f67519435f24e55752daa86f13386b7fc94f