diff --git a/scripts/change_url b/scripts/change_url
index 334bd88..ffd08b0 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -127,6 +127,8 @@ fi
 #=================================================
 ynh_script_progression --message="Updating systemd configuration..." --weight=1
 
+psql_version=$PSQL_VERSION
+
 # Create a dedicated systemd config
 ynh_add_systemd_config
 
diff --git a/scripts/install b/scripts/install
index c5e3d25..ace39c9 100644
--- a/scripts/install
+++ b/scripts/install
@@ -182,6 +182,8 @@ chown $app:$app "$final_path/dendrite.yaml"
 #=================================================
 ynh_script_progression --message="Configuring a systemd service..." --weight=1
 
+psql_version=$PSQL_VERSION
+
 # Create a dedicated systemd config
 ynh_add_systemd_config
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 4715f07..928a84b 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -194,6 +194,8 @@ chown $app:$app "$final_path/dendrite.yaml"
 #=================================================
 ynh_script_progression --message="Upgrading systemd configuration..." --weight=1
 
+psql_version=$PSQL_VERSION
+
 # Create a dedicated systemd config
 ynh_add_systemd_config