diff --git a/scripts/install b/scripts/install
index a5a9dcc..762d11a 100644
--- a/scripts/install
+++ b/scripts/install
@@ -119,6 +119,8 @@ ynh_add_config --template="../conf/config.default.json" --destination="$final_pa
 #=================================================
 ynh_script_progression --message="Configuring a systemd service..." --weight=1
 
+ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="../conf/systemd.service"
+
 ynh_add_systemd_config
 
 #=================================================
diff --git a/scripts/upgrade b/scripts/upgrade
index 86475bf..6c35fa6 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -128,6 +128,8 @@ ynh_system_user_create --username=$app
 #=================================================
 ynh_script_progression --message="Configuring a systemd service..." --weight=2
 
+ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="../conf/systemd.service"
+
 ynh_add_systemd_config
 
 #=================================================