diff --git a/security/s2n-tls/Makefile b/security/s2n-tls/Makefile
index eb5616dd6ccc..865771365ced 100644
--- a/security/s2n-tls/Makefile
+++ b/security/s2n-tls/Makefile
@@ -1,50 +1,50 @@
 PORTNAME=	s2n-tls
 DISTVERSIONPREFIX=	v
-DISTVERSION=	1.5.4
+DISTVERSION=	1.5.5
 PORTEPOCH=	1
 CATEGORIES=	security
 
 MAINTAINER=	eduardo@FreeBSD.org
 COMMENT=	C99 implementation of the TLS/SSL protocols
 WWW=		https://github.com/aws/s2n-tls
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		cmake:testing ssl
 USE_GITHUB=	yes
 GH_ACCOUNT=	aws
 
 USE_LDCONFIG=	yes
 CMAKE_OFF=	BUILD_TESTING
 CMAKE_ON=	BUILD_SHARED_LIBS
 
 SUB_FILES=	pkg-message
 
 PORTDOCS=	*.md doxygen examples images usage-guide
 PORTEXAMPLES=	Makefile *.c
 
 OPTIONS_DEFINE=	DOCS EXAMPLES LTO
 OPTIONS_DEFINE_amd64=	ASM
 OPTIONS_DEFAULT=	LTO
 
 ASM_DESC=	Enable PQ crypto assembly (reqs AVX2 and BMI2 support)
 
 ASM_CMAKE_OFF=	-DS2N_NO_PQ_ASM=1
 LTO_CMAKE_BOOL=	S2N_LTO
 
 .include <bsd.port.options.mk>
 
 .if ${ARCH} != aarch64 && ${ARCH} != amd64 && ${ARCH} != arm && ${ARCH} != armv6 && ${ARCH} != armv7 && ${ARCH} != i386
 CMAKE_ON+=	S2N_NO_PQ
 .endif
 
 do-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	(cd ${WRKSRC}/docs && ${COPYTREE_SHARE} "${PORTDOCS}" ${STAGEDIR}${DOCSDIR})
 
 do-install-EXAMPLES-on:
 	@${MKDIR} ${STAGEDIR}${EXAMPLESDIR}
 	(cd ${WRKSRC}/bin && ${COPYTREE_SHARE} "${PORTEXAMPLES}" ${STAGEDIR}${EXAMPLESDIR})
 
 .include <bsd.port.mk>
diff --git a/security/s2n-tls/distinfo b/security/s2n-tls/distinfo
index 9de1e2577a42..2c34d740ee65 100644
--- a/security/s2n-tls/distinfo
+++ b/security/s2n-tls/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1728026692
-SHA256 (aws-s2n-tls-v1.5.4_GH0.tar.gz) = fa1fb2aacaefd0a64728f301955a331ec08014db3adbf83c8848db8dc60be532
-SIZE (aws-s2n-tls-v1.5.4_GH0.tar.gz) = 4922425
+TIMESTAMP = 1728543843
+SHA256 (aws-s2n-tls-v1.5.5_GH0.tar.gz) = 6316e1ad2c8ef5807519758bb159d314b9fef31d79ae27bc8f809104b978bb04
+SIZE (aws-s2n-tls-v1.5.5_GH0.tar.gz) = 4922367
diff --git a/security/s2n-tls/pkg-plist b/security/s2n-tls/pkg-plist
index 7279d8be4d82..2a1bdd7c97ff 100644
--- a/security/s2n-tls/pkg-plist
+++ b/security/s2n-tls/pkg-plist
@@ -1,13 +1,14 @@
 include/s2n.h
+include/s2n/unstable/cleanup.h
 include/s2n/unstable/crl.h
 include/s2n/unstable/fingerprint.h
 include/s2n/unstable/ktls.h
 include/s2n/unstable/npn.h
 include/s2n/unstable/renegotiate.h
 lib/libs2n.so
 lib/libs2n.so.1
 lib/libs2n.so.1.0.0
 lib/s2n/cmake/modules/Findcrypto.cmake
 lib/s2n/cmake/s2n-config.cmake
 lib/s2n/cmake/shared/s2n-targets-%%CMAKE_BUILD_TYPE%%.cmake
 lib/s2n/cmake/shared/s2n-targets.cmake