diff --git a/.github/scripts/genlocaleslackbuilds b/.github/scripts/genlocaleslackbuilds
index 4c63a02e9..acd8e54fa 100755
--- a/.github/scripts/genlocaleslackbuilds
+++ b/.github/scripts/genlocaleslackbuilds
@@ -49,7 +49,7 @@ cd "$WORKDIR"
 # renovate: datasource=repology depName=slackware_15_0/mozilla-firefox versioning=loose
 FFVERSION=128.4.0esr
 # renovate: datasource=repology depName=slackware_15_0/mozilla-thunderbird versioning=loose
-TBVERSION=128.4.2esr
+TBVERSION=128.4.3esr
 # renovate: datasource=repology depName=slackware_15_0/seamonkey versioning=loose
 SMVERSION=2.53.18