diff --git a/math/py-lmfit/Makefile b/math/py-lmfit/Makefile
index 99e6117efb6e..7054a400fe8f 100644
--- a/math/py-lmfit/Makefile
+++ b/math/py-lmfit/Makefile
@@ -1,36 +1,37 @@
 PORTNAME=	lmfit
-DISTVERSION=	1.3.3
-PORTREVISION=	2
+DISTVERSION=	1.3.4
 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
 
 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=	${PYTHON_PKGNAMEPREFIX}asteval>=1.0:devel/py-asteval@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}dill>=0.3.4:devel/py-dill@${PY_FLAVOR} \
-		${PYTHON_PKGNAMEPREFIX}numpy>=1.16:math/py-numpy@${PY_FLAVOR} \
+		${PYTHON_PKGNAMEPREFIX}numpy>=1.24:math/py-numpy@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}scipy>=1.10.0:science/py-scipy@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}uncertainties>=3.2.2:math/py-uncertainties@${PY_FLAVOR}
 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} \
 		${PYTHON_PKGNAMEPREFIX}pytest-cov>0:devel/py-pytest-cov@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	pep517 autoplist pytest
 
+TEST_ENV=	${MAKE_ENV} PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR} MPLBACKEND=Agg
+
 NO_ARCH=	yes
 
-# tests as of 1.3.3: 5 failed, 654 passed, 12 skipped, 16 warnings in 153.81s (0:02:33) # _tkinter.TclError: no display name and no $DISPLAY environment variable
+# tests as of 1.3.4: 1 failed, 662 passed, 12 skipped, 179 warnings in 27.83s
 
 .include <bsd.port.mk>
diff --git a/math/py-lmfit/distinfo b/math/py-lmfit/distinfo
index 285c676a876d..9487ea46eb2f 100644
--- a/math/py-lmfit/distinfo
+++ b/math/py-lmfit/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1748799852
-SHA256 (lmfit-1.3.3.tar.gz) = 73321e6b881f2f686235721a7dfc02af6bb0f030a25efeb66638f62b1c6053a1
-SIZE (lmfit-1.3.3.tar.gz) = 632645
+TIMESTAMP = 1780789595
+SHA256 (lmfit-1.3.4.tar.gz) = 3c22c28c43f717f6c5b4a3bd81e893a2149739c26a592c046f2e33c23cfbe497
+SIZE (lmfit-1.3.4.tar.gz) = 630720
diff --git a/math/py-lmfit/files/patch-pyproject.toml b/math/py-lmfit/files/patch-pyproject.toml
new file mode 100644
index 000000000000..349a66f20bd5
--- /dev/null
+++ b/math/py-lmfit/files/patch-pyproject.toml
@@ -0,0 +1,12 @@
+--- pyproject.toml.orig	2026-06-06 23:46:51 UTC
++++ pyproject.toml
+@@ -18,8 +18,7 @@ readme = "README.rst"
+ ]
+ description = "Least-Squares Minimization with Bounds and Constraints"
+ readme = "README.rst"
+-license = "BSD-3-Clause"
+-license-files = ["LICENSE"]
++license = {text = "BSD-3-Clause"}
+ keywords = ["curve-fitting, least-squares minimization"]
+ classifiers = [
+     "Development Status :: 5 - Production/Stable",