diff --git a/.gitignore b/.gitignore
index 7f801c9..6f4a403 100644
--- a/.gitignore
+++ b/.gitignore
@@ -182,3 +182,6 @@ thunderbird-langpacks-3.1.2-20100803.tar.bz2
 /thunderbird-52.2.1.source.tar.xz
 /thunderbird-langpacks-52.2.1-20170629.tar.xz
 /l10n-lightning-52.2.1.tar.xz
+/thunderbird-52.3.0.source.tar.xz
+/thunderbird-langpacks-52.3.0-20170821.tar.xz
+/l10n-lightning-52.3.0.tar.xz
diff --git a/sources b/sources
index fc94bfe..dd0fc3e 100644
--- a/sources
+++ b/sources
@@ -1,3 +1,3 @@
-SHA512 (thunderbird-52.2.1.source.tar.xz) = f30ba358b1bfc57265b26da3d2205a8a77c6cd1987278de40cde6c1c1241db3c2fedc60aebb6ff56ffb340492c5580294420158f4b7c4787f558e79f72e3d7fb
-SHA512 (thunderbird-langpacks-52.2.1-20170629.tar.xz) = f5a244359ba417f69ea22d59255a6c77a5786ec84fb13e98849e26107551525920e66c45a7924645daabda909892c3d3c0b4e02e857608edcb7850da3ea03c22
-SHA512 (l10n-lightning-52.2.1.tar.xz) = e90d1d2368741fcdbc310e24ce1dbd9a723afa8524bddd9352995c8ed071ec90f13a7b21c40e6f578b00523d8a3f7d1a5fa1adb34e1dcecfa74ce25f1c5979ad
+SHA512 (thunderbird-52.3.0.source.tar.xz) = 10e6495d207328aae325a797be1de5e535b5d967df929b0af9d7554d0473b5a7931c8f9cb1793e843b1913f441f790169dd4ac1ad9e0e53e66bc8e1c1dd60e66
+SHA512 (thunderbird-langpacks-52.3.0-20170821.tar.xz) = b55de6bd7502278f073bce6f58d8a765d8c877310c6668affd8b303fbb02afc0909d8a65263ea3e07e86dd96c91a47b56865e8fdef2b5775f13448889d376b38
+SHA512 (l10n-lightning-52.3.0.tar.xz) = 17d1f60c156a7d035c01286af445677372c5d43dcbd38e995c3f94bc9bb272ae354e92f41f7dcb8f87b2d2c2631f20fc87a1c2f5b51c29e7f272e5591c517d6c
diff --git a/thunderbird.spec b/thunderbird.spec
index c493811..321be17 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -63,13 +63,13 @@
 %endif
 
 %define tb_version   45.6.0
-%define tarballdir   thunderbird-52.2.1
+%define tarballdir   thunderbird-52.3.0
 
 %define thunderbird_app_id \{3550f703-e582-4d05-9a08-453d09bdfdc6\} 
 # Bump one with each minor lightning release
 %define gdata_version 3.3
 # BUMP VERSION THERE:
-%define gdata_version_internal 0.5
+%define gdata_version_internal 0.6
 %global gdata_extname %{_libdir}/mozilla/extensions/{3550f703-e582-4d05-9a08-453d09bdfdc6}/{a62ef8ec-5fdc-40c2-873c-223b8a6925cc}
 
 # The tarball is pretty inconsistent with directory structure.
@@ -91,14 +91,14 @@
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        52.2.1
-Release:        3%{?dist}
+Version:        52.3.0
+Release:        1%{?dist}
 URL:            http://www.mozilla.org/projects/thunderbird/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Group:          Applications/Internet
 Source0:        ftp://ftp.mozilla.org/pub/thunderbird/releases/%{version}%{?pre_version}/source/thunderbird-%{version}%{?pre_version}.source.tar.xz
 %if %{build_langpacks}
-Source1:        thunderbird-langpacks-%{version}-20170629.tar.xz
+Source1:        thunderbird-langpacks-%{version}-20170821.tar.xz
 %endif
 # Locales for lightning
 Source2:        l10n-lightning-%{version}.tar.xz
@@ -725,6 +725,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Mon Aug 21 2017 Jan Horak <jhorak@redhat.com> - 52.3.0-1
+- Update to 52.3.0
+
 * Thu Aug 03 2017 Fedora Release Engineering <releng@fedoraproject.org> - 52.2.1-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Binutils_Mass_Rebuild