diff --git a/devel/py-bitstring/Makefile b/devel/py-bitstring/Makefile
index 46ef2a022647..28bf9d27b434 100644
--- a/devel/py-bitstring/Makefile
+++ b/devel/py-bitstring/Makefile
@@ -1,35 +1,34 @@
 PORTNAME=	bitstring
-PORTVERSION=	4.1.0
-PORTREVISION=	1
+PORTVERSION=	4.3.1
 CATEGORIES=	devel python
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	sbz@FreeBSD.org
 COMMENT=	Simple construction, analysis, and modification of binary data
 WWW=		https://pypi.org/project/bitstring/
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 USES=		python
 USE_PYTHON=	autoplist concurrent pep517
 
 DOCSDIR=	${PREFIX}/share/doc/py-${PORTNAME}
-PORTDOCS=	PKG-INFO README.md release_notes.txt
+PORTDOCS=	PKG-INFO README.md release_notes.md
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}setuptools>=0:devel/py-setuptools@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}wheel>=0:devel/py-wheel@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}bitarray>=2.8.0:devel/py-bitarray@${PY_FLAVOR}
 
 OPTIONS_DEFINE=	DOCS
 NO_ARCH=	yes
 
 post-install-DOCS-on:
 	@${MKDIR} ${STAGEDIR}${DOCSDIR}
 	${INSTALL_DATA} ${PORTDOCS:S,^,${WRKSRC}/,} ${STAGEDIR}${DOCSDIR}
 
 do-test:
 	@(cd ${WRKSRC}/tests && ${PYTHON_CMD} -c 'import unittest, test_${PORTNAME}; unittest.main(test_${PORTNAME})')
 
 .include <bsd.port.mk>
diff --git a/devel/py-bitstring/distinfo b/devel/py-bitstring/distinfo
index 53f8c39efe40..71def4b573b7 100644
--- a/devel/py-bitstring/distinfo
+++ b/devel/py-bitstring/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1719264861
-SHA256 (bitstring-4.1.0.tar.gz) = b1672fb31721dbb6c809e76a3a19ac76a608e1f8fcacce9349ae2b72b1917b20
-SIZE (bitstring-4.1.0.tar.gz) = 227045
+TIMESTAMP = 1747679082
+SHA256 (bitstring-4.3.1.tar.gz) = a08bc09d3857216d4c0f412a1611056f1cc2b64fd254fb1e8a0afba7cfa1a95a
+SIZE (bitstring-4.3.1.tar.gz) = 251426