diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9defee2..168b39d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](https://semver.org/)
 
+## [Unreleased]
+
+### Changed
+
+- raise OSError on post result graph error
+
 ## [1.0.0beta4] 2024-07-12
 
 ### Fixed
diff --git a/poetry.lock b/poetry.lock
index d192085..99decb9 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1120,13 +1120,13 @@ zstd = ["zstandard (>=0.18.0)"]
 
 [[package]]
 name = "validators"
-version = "0.32.0"
+version = "0.33.0"
 description = "Python Data Validation for Humans™"
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "validators-0.32.0-py3-none-any.whl", hash = "sha256:e9ce1703afb0adf7724b0f98e4081d9d10e88fa5d37254d21e41f27774c020cd"},
-    {file = "validators-0.32.0.tar.gz", hash = "sha256:9ee6e6d7ac9292b9b755a3155d7c361d76bb2dce23def4f0627662da1e300676"},
+    {file = "validators-0.33.0-py3-none-any.whl", hash = "sha256:134b586a98894f8139865953899fc2daeb3d0c35569552c5518f089ae43ed075"},
+    {file = "validators-0.33.0.tar.gz", hash = "sha256:535867e9617f0100e676a1257ba1e206b9bfd847ddc171e4d44811f07ff0bfbf"},
 ]
 
 [package.extras]
@@ -1135,4 +1135,4 @@ crypto-eth-addresses = ["eth-hash[pycryptodome] (>=0.7.0)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "dd60fed6fb82110efd65529dc8d22611a4766eea672161415bc9d13410563804"
+content-hash = "c4ea5cb6b1664dd8c3f4a82c61860452b4caba2bc5ab6da1d777525f06a68397"
diff --git a/pyproject.toml b/pyproject.toml
index 619f358..e4dfd34 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ homepage = "https://github.com/eccenca/cmem-plugin-reason"
 [tool.poetry.dependencies]
 # if you need to change python version here, change it also in .python-version
 python = "^3.11"
-validators = "^0.32.0"
+validators = "^0.33.0"
 pathvalidate = "^3.2.0"
 defusedxml = "^0.7.1"