diff --git a/README.md b/README.md
index b1daac6..1da00fe 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ If you don't have YunoHost, please consult [the guide](https://yunohost.org/#/in
 
 CI runner of YunoHost
 
-**Shipped version:** 2022.01.18~ynh1
+**Shipped version:** 2022.01.18~ynh2
 
 
 
diff --git a/README_fr.md b/README_fr.md
index 17cf0cb..5751f1d 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -13,7 +13,7 @@ Si vous n'avez pas YunoHost, regardez [ici](https://yunohost.org/#/install) pour
 
 Runner d'intégration continue de YunoHost
 
-**Version incluse :** 2022.01.18~ynh1
+**Version incluse :** 2022.01.18~ynh2
 
 
 
diff --git a/conf/yunorunner.config.py b/conf/yunorunner.config.py
index 043c915..e160c44 100644
--- a/conf/yunorunner.config.py
+++ b/conf/yunorunner.config.py
@@ -6,3 +6,4 @@ MONITOR_APPS_LIST = False
 MONITOR_GIT = False
 MONITOR_ONLY_GOOD_QUALITY_APPS = False
 MONTHLY_JOBS = False
+WORKER_COUNT = 1
diff --git a/manifest.json b/manifest.json
index b03f1d5..1b2152d 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "CI runner of YunoHost",
         "fr": "Runner d'intégration continue de YunoHost"
     },
-    "version": "2022.01.18~ynh1",
+    "version": "2022.01.18~ynh2",
     "url": "https://github.com/YunoHost/yunorunner",
     "upstream": {
         "license": "GPL-3.0-or-later",
diff --git a/scripts/upgrade b/scripts/upgrade
index ee7e676..1b0b201 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -156,7 +156,7 @@ popd
 #=================================================
 ynh_script_progression --message="Updating a config file..."
 
-ynh_add_config --template="yunorunner.config.py" --destination="$final_path/config.py"
+ynh_backup_if_checksum_is_different --file="$final_path/config.py"
 
 chmod 400 "$final_path/config.py"
 chown $app:$app "$final_path/config.py"