diff --git a/lang/spidermonkey115/Makefile b/lang/spidermonkey115/Makefile
index a79d94324b3a..25051118e9d0 100644
--- a/lang/spidermonkey115/Makefile
+++ b/lang/spidermonkey115/Makefile
@@ -1,80 +1,79 @@
 PORTNAME=	spidermonkey
-DISTVERSION=	115.19.0
-PORTREVISION=	3
+DISTVERSION=	115.21.0
 CATEGORIES=	lang
 MASTER_SITES=	MOZILLA/firefox/releases/${DISTVERSION}esr/source \
 		MOZILLA/firefox/candidates/${DISTVERSION}esr-candidates/build1/source
 PKGNAMESUFFIX=	${SP_VER}
 DISTNAME=	firefox-${DISTVERSION}esr.source
 
 PATCH_SITES=	https://hg.mozilla.org/mozilla-central/raw-rev/
 PATCHFILES+=	223087fdc29f18678f6174e9807b8780e439acf6:-p1 # https://bugzilla.mozilla.org/1894423
 PATCHFILES+=	68ff4d3f7338248b4d67cf03aade5a73f8d396b2:-p1 # https://bugzilla.mozilla.org/1849070
 
 MAINTAINER=	vishwin@FreeBSD.org
 COMMENT=	Standalone JavaScript based from Mozilla 115-esr
 WWW=		https://spidermonkey.dev/
 
 LICENSE=	MPL20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	gm4:devel/m4 \
 		${RUST_DEFAULT}>=1.81:lang/${RUST_DEFAULT} \
 		rust-cbindgen>=0.26.0:devel/rust-cbindgen
 LIB_DEPENDS=	libicudata.so:devel/icu \
 		libnspr4.so:devel/nspr
 
 USES=		compiler:c++17-lang gmake llvm:noexport localbase pathfix pkgconfig \
 		python:build tar:xz
 USE_LDCONFIG=	yes
 SP_VER=		115
 HAS_CONFIGURE=	yes
 
 WRKSRC=			${WRKDIR}/firefox-${DISTVERSION}/
 PATCH_WRKSRC=		${WRKDIR}/firefox-${DISTVERSION}/
 CONFIGURE_OUTSOURCE=	yes
 
 CONFIGURE_ARGS=	--enable-application=js \
 		--disable-debug \
 		--disable-debug-symbols \
 		--disable-jemalloc \
 		--disable-tests \
 		--enable-optimize \
 		--enable-readline \
 		--enable-shared-js \
 		--prefix=${PREFIX:Q} \
 		--target=${CONFIGURE_TARGET} \
 		--with-intl-api \
 		--with-system-icu \
 		--with-system-nspr \
 		--with-system-zlib
 
 CONFIGURE_ENV=	HOST_CC=${CC} \
 		HOST_CXX=${CXX}
 
 BINARY_ALIAS=	python3=${PYTHON_CMD}
 PLIST_SUB=	SP_VER=${SP_VER}
 
 .include <bsd.port.pre.mk>
 
 .if ${ARCH} == amd64
 CONFIGURE_TARGET=	x86_64-portbld-freebsd${OSREL}
 .endif
 
 .if ${CHOSEN_COMPILER_TYPE} == gcc
 CONFIGURE_ENV+=	LLVM_CONFIG=${LLVM_CONFIG} \
 		LLVM_OBJDUMP=llvm-objdump${LLVM_VERSION}
 BUILD_DEPENDS+=	${LOCALBASE}/bin/llvm-objdump${LLVM_VERSION}:${LLVM_PORT}
 USE_GCC=	yes
 .endif
 
 post-patch:
 	@${REINPLACE_CMD} -e 's|%%LOCALBASE%%|${LOCALBASE}|g' ${WRKSRC}/js/moz.configure
 	@${REINPLACE_CMD} -e 's|icu-i18n|icu-uc icu-i18n|g' ${WRKSRC}/js/moz.configure
 
 post-install:
 	${RM} ${STAGEDIR}${PREFIX}/lib/libjs_static.ajs
 	${LN} -fs libmozjs-${SP_VER}.so ${STAGEDIR}${PREFIX}/lib/libmozjs-${SP_VER}.so.1
 	${STRIP_CMD} ${STAGEDIR}${PREFIX}/lib/libmozjs-${SP_VER}.*
 
 .include <bsd.port.post.mk>
diff --git a/lang/spidermonkey115/distinfo b/lang/spidermonkey115/distinfo
index d0dff96d77fe..8fbd66e11c5e 100644
--- a/lang/spidermonkey115/distinfo
+++ b/lang/spidermonkey115/distinfo
@@ -1,7 +1,7 @@
-TIMESTAMP = 1736206585
-SHA256 (firefox-115.19.0esr.source.tar.xz) = 7e64a398e84208ac494d3311f849971723c3fe3c516f854c2c8fecd04968bed6
-SIZE (firefox-115.19.0esr.source.tar.xz) = 505810580
+TIMESTAMP = 1740438956
+SHA256 (firefox-115.21.0esr.source.tar.xz) = ff118b1d6d17cefe8eef08bba74ae0d47939010d21afdbaadd8859fd4016b674
+SIZE (firefox-115.21.0esr.source.tar.xz) = 509630248
 SHA256 (223087fdc29f18678f6174e9807b8780e439acf6) = f234371584e2b2bc9953ae4fd145da19c99a6f04087f53d59616aecf29df039c
 SIZE (223087fdc29f18678f6174e9807b8780e439acf6) = 1597
 SHA256 (68ff4d3f7338248b4d67cf03aade5a73f8d396b2) = 8d556dcb0d3a76a6cb8870b6eff45fafe0a78760ea24d34ea0b5e7ceb4489a71
 SIZE (68ff4d3f7338248b4d67cf03aade5a73f8d396b2) = 2546