diff --git a/srcpkgs/thunderbird-i18n/template b/srcpkgs/thunderbird-i18n/template
index 963b235874..64b146a10c 100644
--- a/srcpkgs/thunderbird-i18n/template
+++ b/srcpkgs/thunderbird-i18n/template
@@ -1,7 +1,7 @@
 # Template file for 'thunderbird-i18n'
 pkgname=thunderbird-i18n
-version=31.1.2
-revision=2
+version=31.4.0
+revision=1
 homepage="http://www.mozilla.com/"
 short_desc="Thunderbird language packs"
 maintainer="Enno Boland <eb@s01.de>"
@@ -101,58 +101,58 @@ _pkgtmpl() {
 }
 
 checksum="
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 "
diff --git a/srcpkgs/thunderbird/template b/srcpkgs/thunderbird/template
index 47000c25f3..cccfbb0878 100644
--- a/srcpkgs/thunderbird/template
+++ b/srcpkgs/thunderbird/template
@@ -1,6 +1,6 @@
 # Template build file for 'thunderbird'.
 pkgname=thunderbird
-version=31.1.2
+version=31.4.0
 revision=1
 lib32disabled=yes
 wrksrc="comm-esr${version/.*/}"
@@ -9,9 +9,9 @@ maintainer="Enno Boland <eb@s01.de>"
 homepage="http://www.mozilla.org/thunderbird/"
 license="MPL-1.1, GPL-2, LGPL-2.1"
 distfiles="${MOZILLA_SITE}/${pkgname}/releases/${version}/source/${pkgname}-${version}.source.tar.bz2"
-checksum=86b18e7642ad8e6004cb4826daec586a24fae8a27da59df49f0039495dd5d7b5
+checksum=3e4b6cb5934b7a8e51a673044e0691eb7cd88a08415494673cd7eadb35cd90c3
 
-hostmakedepends="unzip zip perl python yasm pkg-config"
+hostmakedepends="unzip zip perl python yasm pkg-config autoconf"
 makedepends="python-devel cairo-devel libjpeg-turbo-devel pixman-devel
  nss-devel>=3.15.4 sqlite-devel libXrender-devel gtk+-devel libevent-devel
  libvpx-devel hunspell-devel>=1.3.2 startup-notification-devel dbus-glib-devel