diff --git a/changelog.md b/changelog.md
index a914f00..e9025c7 100644
--- a/changelog.md
+++ b/changelog.md
@@ -5,6 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.1.3] - 2023-07-24
+- fix conf parameter name
+
 ## [0.1.2] - 2023-07-24
 - fix path to cacert-idp binary
 
diff --git a/docs/cacert-oidc-idp.service b/docs/cacert-oidc-idp.service
index ae84b64..3f86972 100644
--- a/docs/cacert-oidc-idp.service
+++ b/docs/cacert-oidc-idp.service
@@ -4,7 +4,7 @@ Description=CAcert OpenID Connect Identity Provider for ORY Hydra
 [Service]
 AmbientCapabilities=CAP_NET_BIND_SERVICE
 ExecCondition=/bin/sh -c 'test -f /etc/cacert-oidc-idp/idp.toml'
-ExecStart=/usr/bin/cacert-idp --config /etc/cacert-oidc-idp/idp.toml
+ExecStart=/usr/bin/cacert-idp --conf /etc/cacert-oidc-idp/idp.toml
 StateDirectory=cacert-oidc-idp
 User=cacert-oidc-idp
 Group=cacert-oidc-idp