diff --git a/thunderbird-bin/.signature b/thunderbird-bin/.signature
index a88f359c1..0e1724139 100644
--- a/thunderbird-bin/.signature
+++ b/thunderbird-bin/.signature
@@ -1,6 +1,6 @@
 untrusted comment: verify with /etc/ports/opt.pub
-RWSE3ohX2g5d/fzvZ0cssjHhd8YkcPDojg/E9t3kp/T9qRu7Nu0yv2ZKKVIN9jP9W+/8Y3AoBKOUaopB/ACBeN9C13BFIHlzCgs=
-SHA256 (Pkgfile) = 3103dd7fd6e65c5be7d521fa78de9c88de173b1affab72a9fd4bc38654c624ae
+RWSE3ohX2g5d/VgauZvEySAO182p5Kx0PD4hyBTqiHbjRRlzm682HtvVqFqdYfdu0nCa5y7jobsQVkg+3it5RN4yNloSAXZzcQY=
+SHA256 (Pkgfile) = b11dd5b0c6473fd21821b4f219335fb53acc94422fb1733773deafe455184bf8
 SHA256 (.footprint) = caf9005cb9de0d6ba0efe5220ab8ef3eba29687acbaf95eb542c4b82df85f03b
-SHA256 (thunderbird-78.3.3.tar.bz2) = 55e3e805837f05323f505676d7247a39fa09a1c9a0a613baa185d33ecea6c3b8
+SHA256 (thunderbird-78.4.0.tar.bz2) = 24780daa2b17799f263a6c16b770b0e6710d14f7f1f502f4868fe48d81ca8e48
 SHA256 (policies.json) = cf856011307f7831d74cdacb4e80b6dceaa49882b8dcba008d527a78764903f4
diff --git a/thunderbird-bin/Pkgfile b/thunderbird-bin/Pkgfile
index 5edec6691..b412baecc 100644
--- a/thunderbird-bin/Pkgfile
+++ b/thunderbird-bin/Pkgfile
@@ -4,7 +4,7 @@
 # Depends on: gtk3, dbus-glib
 
 name=thunderbird-bin
-version=78.3.3
+version=78.4.0
 release=1
 source=(http://ftp.mozilla.org/pub/thunderbird/releases/$version/linux-x86_64/en-US/thunderbird-$version.tar.bz2 \
 	policies.json)