diff --git a/scripts/install b/scripts/install
index 15f2345..14c33c5 100644
--- a/scripts/install
+++ b/scripts/install
@@ -95,6 +95,9 @@ ynh_system_user_create --username=$app --home_dir=$final_path
 ynh_script_progression --message="Installing application using node..."
 
 pushd $final_path
+# set port in configuration file
+	sed -i "/HTTP_PORT/s/[0-9]*[0-9]/$port/" package.json
+	sed -i "/HTTPS_PORT/s/[0-9]*[0-9]/$https_port/" package.json
 # use custom home value to avoid bower storing values in root and have right errors
 	[[ -v HOME ]] && TMP_HOME=$HOME
 	HOME=$(pwd)
diff --git a/scripts/upgrade b/scripts/upgrade
index 9556209..74be857 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -84,6 +84,10 @@ ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
 ynh_script_progression --message="Upgrading the app..." --weight=5
 
 pushd $final_path
+# set port in configuration file
+        sed -i "/HTTP_PORT/s/[0-9]*[0-9]/$port/" package.json
+        sed -i "/HTTPS_PORT/s/[0-9]*[0-9]/$https_port/" package.json
+
         TMP_HOME=$HOME
         HOME=$(pwd)
         ynh_use_nodejs