diff --git a/math/py-arviz/Makefile b/math/py-arviz/Makefile
index 3f9280537b0c..156a97629c7f 100644
--- a/math/py-arviz/Makefile
+++ b/math/py-arviz/Makefile
@@ -1,35 +1,35 @@
 PORTNAME=	arviz
 DISTVERSIONPREFIX=	v
-DISTVERSION=	1.0.0
+DISTVERSION=	1.1.0
 CATEGORIES=	math python
 #MASTER_SITES=	PYPI # missing test files
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Package for exploratory analysis of Bayesian models
 WWW=		https://python.arviz.org/en/stable/ \
 		https://github.com/arviz-devs/arviz
 
 LICENSE=	APACHE20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}flit-core>0:devel/py-flit-core@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}arviz-base>=1.0.0:math/py-arviz-base@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}arviz-stats>=1.0.0:math/py-arviz-stats@${PY_FLAVOR} \
 		${PYTHON_PKGNAMEPREFIX}arviz-plots>=1.0.0:math/py-arviz-plots@${PY_FLAVOR}
 TEST_DEPENDS=	${PYTHON_PKGNAMEPREFIX}pytest-cov>0:devel/py-pytest-cov@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	pep517 autoplist pytest
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	arviz-devs
 
 NO_ARCH=	yes
 
 TEST_ARGS=	-p no:benchmark -p no:xdist -p no:relaxed
 
 TEST_ENV=	${MAKE_ENV} \
 		PYTHONPATH=${STAGEDIR}${PYTHONPREFIX_SITELIBDIR}
 
 .include <bsd.port.mk>
diff --git a/math/py-arviz/distinfo b/math/py-arviz/distinfo
index d8b88e833757..327d64a4f0de 100644
--- a/math/py-arviz/distinfo
+++ b/math/py-arviz/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1776436995
-SHA256 (arviz-devs-arviz-v1.0.0_GH0.tar.gz) = 1e94dc492f230a2b766a5a7c05d259bf7b6df6e8a651556d72e071263eb4240e
-SIZE (arviz-devs-arviz-v1.0.0_GH0.tar.gz) = 4705693
+TIMESTAMP = 1777012388
+SHA256 (arviz-devs-arviz-v1.1.0_GH0.tar.gz) = 605784bf63f57cb91a808d86a3daf64bb3cf57f17b6ae7882bb014df022b878a
+SIZE (arviz-devs-arviz-v1.1.0_GH0.tar.gz) = 4860199
diff --git a/math/py-arviz/files/patch-pyproject.toml b/math/py-arviz/files/patch-pyproject.toml
new file mode 100644
index 000000000000..7b70ed34f084
--- /dev/null
+++ b/math/py-arviz/files/patch-pyproject.toml
@@ -0,0 +1,11 @@
+--- pyproject.toml.orig	2026-04-17 17:36:06 UTC
++++ pyproject.toml
+@@ -5,7 +5,7 @@ readme = "README.md"
+ [project]
+ name = "arviz"
+ readme = "README.md"
+-requires-python = ">=3.12"
++requires-python = ">=3.11"
+ license = {file = "LICENSE"}
+ authors = [
+     {name = "ArviZ team", email = "arvizdevs@gmail.com"}