diff --git a/misc/py-langchain-protocol/Makefile b/misc/py-langchain-protocol/Makefile
index 6c9b6d6d343e..8257588cf6d9 100644
--- a/misc/py-langchain-protocol/Makefile
+++ b/misc/py-langchain-protocol/Makefile
@@ -1,23 +1,23 @@
 PORTNAME=	langchain-protocol
-DISTVERSION=	0.0.18
+DISTVERSION=	0.0.19
 CATEGORIES=	misc python # machine-learning
 MASTER_SITES=	PYPI
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 DISTNAME=	${PORTNAME:S/-/_/}-${PORTVERSION}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Python bindings for the LangChain agent streaming protocol
 WWW=		https://github.com/langchain-ai/agent-protocol/tree/main/streaming \
 		https://github.com/langchain-ai/agent-protocol
 
 LICENSE=	MIT
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}hatchling>0:devel/py-hatchling@${PY_FLAVOR}
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}typing-extensions>=4.13.0:devel/py-typing-extensions@${PY_FLAVOR}
 
 USES=		python
 USE_PYTHON=	pep517 autoplist
 
 NO_ARCH=	yes
 
 .include <bsd.port.mk>
diff --git a/misc/py-langchain-protocol/distinfo b/misc/py-langchain-protocol/distinfo
index a6befddcc217..2dbe970a043f 100644
--- a/misc/py-langchain-protocol/distinfo
+++ b/misc/py-langchain-protocol/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1781896385
-SHA256 (langchain_protocol-0.0.18.tar.gz) = ec3e11782f1ed0c9db38e5a9ed01b0e7a0d3fba406faa8aef6594b73c56a63e6
-SIZE (langchain_protocol-0.0.18.tar.gz) = 6150
+TIMESTAMP = 1788718646
+SHA256 (langchain_protocol-0.0.19.tar.gz) = 79d90a1425122ac87e8052e2ec054fbd09c3edbf341bdfb6397112a495c7bf8c
+SIZE (langchain_protocol-0.0.19.tar.gz) = 6265
diff --git a/misc/py-langchain-protocol/files/patch-pyproject.toml b/misc/py-langchain-protocol/files/patch-pyproject.toml
new file mode 100644
index 000000000000..fd33ff5a09eb
--- /dev/null
+++ b/misc/py-langchain-protocol/files/patch-pyproject.toml
@@ -0,0 +1,14 @@
+-- Remove the upper bound on hatchling.  Upstream pins hatchling<1.30, but the
+-- FreeBSD Python ports ship hatchling 1.32.0 and the pin is only a build-tool
+-- policy, not a runtime requirement.  Keeping the lower bound preserves the
+-- upstream minimum while allowing the current Ports tree version.
+
+--- pyproject.toml.orig	2026-09-06 00:00:00 UTC
++++ pyproject.toml
+@@ -1,5 +1,5 @@
+ [build-system]
+-requires = ["hatchling>=1.26,<1.30"]
++requires = ["hatchling>=1.26"]
+ build-backend = "hatchling.build"
+
+ [project]