diff --git a/mail/thunderbird/Makefile b/mail/thunderbird/Makefile
index 96898a459189..1d03bf083400 100644
--- a/mail/thunderbird/Makefile
+++ b/mail/thunderbird/Makefile
@@ -1,5 +1,5 @@
 PORTNAME=	thunderbird
-DISTVERSION=	128.4.2
+DISTVERSION=	128.4.3
 CATEGORIES=	mail news net-im wayland
 MASTER_SITES=	MOZILLA/${PORTNAME}/releases/${DISTVERSION}esr/source \
 		MOZILLA/${PORTNAME}/candidates/${DISTVERSION}esr-candidates/build1/source
diff --git a/mail/thunderbird/distinfo b/mail/thunderbird/distinfo
index bb806544c8d1..5774ac0be872 100644
--- a/mail/thunderbird/distinfo
+++ b/mail/thunderbird/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1730923429
-SHA256 (thunderbird-128.4.2esr.source.tar.xz) = 6fa81eeabb89f02792738718168586bd75c07dc9256e79b26438da70e80dd0d8
-SIZE (thunderbird-128.4.2esr.source.tar.xz) = 676111384
+TIMESTAMP = 1731149821
+SHA256 (thunderbird-128.4.3esr.source.tar.xz) = 146edcfee47ebaa3fb6cf877a0747140dd011a3f6b674c98cdc61b9e98bbd61c
+SIZE (thunderbird-128.4.3esr.source.tar.xz) = 673965268