diff --git a/pkgbuild/thunderbird-nightly/PKGBUILD b/pkgbuild/thunderbird-nightly/PKGBUILD
index 14cec3a..1518b1c 100644
--- a/pkgbuild/thunderbird-nightly/PKGBUILD
+++ b/pkgbuild/thunderbird-nightly/PKGBUILD
@@ -3,7 +3,7 @@
 # Based on [extra]'s thunderbird
 
 pkgname=thunderbird-nightly
-pkgver=26.0a1
+pkgver=27.0a1
 pkgrel=1
 pkgdesc="Standalone Mail/News reader - Nightly build"
 arch=('i686' 'x86_64')