diff --git a/math/py-lmfit/Makefile b/math/py-lmfit/Makefile
index de0df2cb5302..0e880e104e2d 100644
--- a/math/py-lmfit/Makefile
+++ b/math/py-lmfit/Makefile
@@ -1,35 +1,35 @@
 PORTNAME=	lmfit
-DISTVERSION=	1.3.0
+DISTVERSION=	1.3.1
 CATEGORIES=	math
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Least-squares Minimization with bounds and constraints
 WWW=		https://lmfit.github.io/lmfit-py/
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 PY_DEPENDS=	${PYTHON_PKGNAMEPREFIX}asteval>=0.9.28:devel/py-asteval@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}dill>0:devel/py-dill@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}dill>=0.3.4:devel/py-dill@${PY_FLAVOR} \
 		${PYNUMPY} \
 		${PYTHON_PKGNAMEPREFIX}scipy>=1.6:science/py-scipy@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}uncertainties>=3.1.4:math/py-uncertainties@${PY_FLAVOR}
 BUILD_DEPENDS=	${PY_SETUPTOOLS} \
 		${PYTHON_PKGNAMEPREFIX}setuptools-scm>0:devel/py-setuptools-scm@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}wheel>0:devel/py-wheel@${PY_FLAVOR} \
 		${PY_DEPENDS}
 RUN_DEPENDS=	${PY_DEPENDS}
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}coverage>0:devel/py-coverage@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}flaky>0:devel/py-flaky@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}matplotlib>0:math/py-matplotlib@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}numdifftools>0:math/py-numdifftools@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}pytest-cov>0:devel/py-pytest-cov@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	pep517 autoplist pytest # 4 tests fail because of the DISPLAY variable:  _tkinter.TclError: no display name and no $DISPLAY environment variable
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
diff --git a/math/py-lmfit/distinfo b/math/py-lmfit/distinfo
index c4ba3f65a2ea..7902224717f5 100644
--- a/math/py-lmfit/distinfo
+++ b/math/py-lmfit/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1712366349
-SHA256 (lmfit-1.3.0.tar.gz) = 7e823aebc05237ca80d33d260cedbba5e26190ccec9faf595e68143909de0c93
-SIZE (lmfit-1.3.0.tar.gz) = 628754
+TIMESTAMP = 1713597532
+SHA256 (lmfit-1.3.1.tar.gz) = bc386244adbd10ef1a2a2c4f9d17b3def905552c0a64aef854f0ad46cc309cc5
+SIZE (lmfit-1.3.1.tar.gz) = 629917