diff --git a/.firefox.metadata b/.firefox.metadata
index 34467d5..ab7d8e1 100644
--- a/.firefox.metadata
+++ b/.firefox.metadata
@@ -1,6 +1,6 @@
 511960dd78451a06c9df76509635aeec05b2051a SOURCES/Python-2.7.8.tgz
 467bdb846d67c01aed9e521fe0ef280065a50c3c SOURCES/devtoolset-2-binutils-2.23.52.0.1-10.el5.src.rpm
-4941f498f8ec838b1bdc70fc8f13c8fde379ddce SOURCES/firefox-52.5.0esr.source.tar.xz
-0ef9b869a366758141ec6f75cdd6633e137e8386 SOURCES/firefox-langpacks-52.5.0esr-20171109.tar.xz
+1e81e2ed5957a432e4b66a46de4f50ac01f4752a SOURCES/firefox-52.5.1esr.source.tar.xz
+9e5e5f307f4aea6f3530d3d8031c283244016bc2 SOURCES/firefox-langpacks-52.5.1esr-20171129.tar.xz
 e5ba84786af5d0e0e23b1a9112c76821ef23306c SOURCES/gcc48-4.8.2-16.el5.src.rpm
 77fd30f7ebc12a629a31c1e252cec06af55a71fe SOURCES/yasm-1.2.0-3.el5.src.rpm
diff --git a/.gitignore b/.gitignore
index eb22979..de5bdb2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,6 @@
 SOURCES/Python-2.7.8.tgz
 SOURCES/devtoolset-2-binutils-2.23.52.0.1-10.el5.src.rpm
-SOURCES/firefox-52.5.0esr.source.tar.xz
-SOURCES/firefox-langpacks-52.5.0esr-20171109.tar.xz
+SOURCES/firefox-52.5.1esr.source.tar.xz
+SOURCES/firefox-langpacks-52.5.1esr-20171129.tar.xz
 SOURCES/gcc48-4.8.2-16.el5.src.rpm
 SOURCES/yasm-1.2.0-3.el5.src.rpm
diff --git a/README.debrand b/README.debrand
deleted file mode 100644
index 01c46d2..0000000
--- a/README.debrand
+++ /dev/null
@@ -1,2 +0,0 @@
-Warning: This package was configured for automatic debranding, but the changes
-failed to apply.
diff --git a/SPECS/firefox.spec b/SPECS/firefox.spec
index 0deed9a..0fd457c 100644
--- a/SPECS/firefox.spec
+++ b/SPECS/firefox.spec
@@ -76,7 +76,7 @@
 
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
-Version:        52.5.0
+Version:        52.5.1
 Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
@@ -88,7 +88,7 @@ Group:          Applications/Internet
 # From ftp://archive.mozilla.org/pub/firefox/releases/%{version}%{?ext_version}/source
 Source0:        firefox-%{version}%{?ext_version}.source.tar.xz
 %if %{build_langpacks}
-Source1:        firefox-langpacks-%{version}%{?ext_version}-20171109.tar.xz
+Source1:        firefox-langpacks-%{version}%{?ext_version}-20171129.tar.xz
 %endif
 Source10:       firefox-mozconfig
 Source12:       firefox-redhat-default-prefs.js
@@ -885,8 +885,8 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
-* Fri Nov 17 2017 CentOS Sources <bugs@centos.org> - 52.5.0-1.el7.centos
-- Apply debranding changes
+* Wed Nov 29 2017 Jan Horak <jhorak@redhat.com> - 52.5.1-1
+- Update to 52.5.1 ESR
 
 * Thu Nov  9 2017 Jan Horak <jhorak@redhat.com> - 52.5.0-1
 - Update to 52.5.0 ESR