diff --git a/extra/js128/.SRCINFO b/extra/js128/.SRCINFO
index 3b8a7cc60..74d9281b0 100644
--- a/extra/js128/.SRCINFO
+++ b/extra/js128/.SRCINFO
@@ -1,6 +1,6 @@
 pkgbase = js128
 	pkgdesc = JavaScript interpreter and libraries - Version 128
-	pkgver = 128.3.1
+	pkgver = 128.4.0
 	pkgrel = 1
 	url = https://spidermonkey.dev/
 	arch = x86_64
@@ -20,12 +20,12 @@ pkgbase = js128
 	depends = sh
 	depends = zlib
 	options = !lto
-	source = https://archive.mozilla.org/pub/firefox/releases/128.3.1esr/source/firefox-128.3.1esr.source.tar.xz
-	source = https://archive.mozilla.org/pub/firefox/releases/128.3.1esr/source/firefox-128.3.1esr.source.tar.xz.asc
+	source = https://archive.mozilla.org/pub/firefox/releases/128.4.0esr/source/firefox-128.4.0esr.source.tar.xz
+	source = https://archive.mozilla.org/pub/firefox/releases/128.4.0esr/source/firefox-128.4.0esr.source.tar.xz.asc
 	validpgpkeys = 14F26682D0916CDD81E37B6D61B7B526D98F0353
-	sha256sums = c1f4052f3a88d96a122551d5025053304007f7649886d5e2fdfd1a11ce3d70a8
+	sha256sums = 074014e1c26144e10707b12a271176a4b6b67021e91444b613edae38d188febc
 	sha256sums = SKIP
-	b2sums = ff2663743c160b227057bbf05915d27c9f04dcf605811933f91cc50b9de55c9e75c3583144fbfbe6a1bbc4570b636ba5918b30f034b6af744f615e6e9de0d594
+	b2sums = 1f0528c8806bb034af623f2022740bb5056ea11817b9cb7154a60b87f04051ba5ae06b0daf55e6b03b7531c369deb871d3d3579a86f3ca19f3ab71ccb45243f9
 	b2sums = SKIP
 
 pkgname = js128
diff --git a/extra/js128/PKGBUILD b/extra/js128/PKGBUILD
index 8083b2863..c7a52bace 100644
--- a/extra/js128/PKGBUILD
+++ b/extra/js128/PKGBUILD
@@ -5,7 +5,7 @@
 #  - remove PGO build
 
 pkgname=js128
-pkgver=128.3.1
+pkgver=128.4.0
 pkgrel=1
 pkgdesc="JavaScript interpreter and libraries - Version 128"
 url="https://spidermonkey.dev/"
@@ -43,9 +43,9 @@ validpgpkeys=(
   # https://blog.mozilla.org/security/2023/05/11/updated-gpg-key-for-signing-firefox-releases/
   14F26682D0916CDD81E37B6D61B7B526D98F0353
 )
-sha256sums=('c1f4052f3a88d96a122551d5025053304007f7649886d5e2fdfd1a11ce3d70a8'
+sha256sums=('074014e1c26144e10707b12a271176a4b6b67021e91444b613edae38d188febc'
             'SKIP')
-b2sums=('ff2663743c160b227057bbf05915d27c9f04dcf605811933f91cc50b9de55c9e75c3583144fbfbe6a1bbc4570b636ba5918b30f034b6af744f615e6e9de0d594'
+b2sums=('1f0528c8806bb034af623f2022740bb5056ea11817b9cb7154a60b87f04051ba5ae06b0daf55e6b03b7531c369deb871d3d3579a86f3ca19f3ab71ccb45243f9'
         'SKIP')
 
 # Make sure the duplication between bin and lib is found