diff --git a/.gitignore b/.gitignore
index e603000..54addda 100644
--- a/.gitignore
+++ b/.gitignore
@@ -122,3 +122,6 @@ thunderbird-langpacks-3.1.2-20100803.tar.bz2
 /thunderbird-38.3.0.source.tar.bz2
 /thunderbird-langpacks-38.3.0-20150929.tar.xz
 /l10n-lightning-38.3.0.tar.xz
+/thunderbird-38.4.0.source.tar.bz2
+/thunderbird-langpacks-38.4.0-20151130.tar.xz
+/l10n-lightning-38.4.0.tar.xz
diff --git a/sources b/sources
index 5abeaa3..7dc16b6 100644
--- a/sources
+++ b/sources
@@ -1,3 +1,3 @@
-81dd8b5679787fd5fd91b76bc7923951  thunderbird-38.3.0.source.tar.bz2
-6e7de601ea9fed5805d8e901eb12385d  thunderbird-langpacks-38.3.0-20150929.tar.xz
-ba90e519df15fe32deac1d4d2aa49554  l10n-lightning-38.3.0.tar.xz
+483373b1485cf2edea77c75a69602870  thunderbird-38.4.0.source.tar.bz2
+ed88f7c2c6ea6cab803dea46eb0dc549  thunderbird-langpacks-38.4.0-20151130.tar.xz
+ba90e519df15fe32deac1d4d2aa49554  l10n-lightning-38.4.0.tar.xz
diff --git a/thunderbird.spec b/thunderbird.spec
index 8ac350d..653debc 100644
--- a/thunderbird.spec
+++ b/thunderbird.spec
@@ -63,14 +63,14 @@
 
 Summary:        Mozilla Thunderbird mail/newsgroup client
 Name:           thunderbird
-Version:        38.3.0
-Release:        3%{?dist}
+Version:        38.4.0
+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.bz2
 %if %{build_langpacks}
-Source1:        thunderbird-langpacks-%{version}-20150929.tar.xz
+Source1:        thunderbird-langpacks-%{version}-20151130.tar.xz
 %endif
 # Locales for lightning
 Source2:        l10n-lightning-%{version}.tar.xz
@@ -181,7 +181,7 @@ debug %{name}, you want to install %{name}-debuginfo instead.
 
 %package lightning-gdata
 Summary:        Lightning data provider for Google Calendar
-Version:        38.3.0%{gdata_version}.%{gdata_version_internal}
+Version:        38.4.0%{gdata_version}.%{gdata_version_internal}
 Requires:       %{name}%{?_isa} = %{tb_version}-%{release}
 
 %description lightning-gdata
@@ -588,6 +588,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #===============================================================================
 
 %changelog
+* Mon Nov 30 2015 Jan Horak <jhorak@redhat.com> - 38.4.0-1
+- Update to 38.4.0
+
 * Fri Nov 27 2015 Martin Stransky <stransky@redhat.com> - 31.3.0-3
 - Enabled hardened builds (rhbz#1283945)