diff --git a/README.md b/README.md
index ed23146..8ac7362 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 
 ## Payum Stripe checkout session gateway bundle
 
-This bundle is designed to add a new gateway to Payum to support Stripe checkout session over symfony bundle
+This bundle is design to add a new gateway to Payum to support Stripe checkout session and Stripe JS gateways over symfony bundle
 
 See https://stripe.com/docs/payments/checkout for more information.
 
@@ -85,6 +85,12 @@ payum:
       secret_key: pk_test_publishablekey
       webhook_secret_keys:
         - whsec_test_webhookkey
+    stripe_js:
+      factory: stripe_js
+      publishable_key: sk_test_secretkey
+      secret_key: pk_test_publishablekey
+      webhook_secret_keys:
+        - whsec_test_webhookkey
 ```
 
 ## Usage
diff --git a/UPGRADE.md b/UPGRADE.md
index 0991d25..3a6e229 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -1,3 +1,8 @@
+# UPGRADE FROM `v1.2.0` TO `v1.2.1`
+
+The service name of stripe checkout session gateway as been renamed :
+from `flux_se.payum_stripe.gateway_factory_builder` to `flux_se.payum_stripe_checkout_session.gateway_factory_builder`
+
 # UPGRADE FROM `v1.1.0` TO `v1.2.0`
 
 * **BC BREAK**: This bundle has been renamed from
diff --git a/composer.json b/composer.json
index ccb2a40..73d2793 100644
--- a/composer.json
+++ b/composer.json
@@ -3,7 +3,7 @@
     "description": "Payum Stripe gateways bundle",
     "type": "symfony-bundle",
     "require": {
-        "flux-se/payum-stripe": "^1.1",
+        "flux-se/payum-stripe": "^1.2.1",
         "symfony/http-kernel": "^4.1|^5.1.5",
         "symfony/dependency-injection": "^4.1|^5.1.5",
         "symfony/config": "^4.1|^5.1.5"
@@ -22,7 +22,7 @@
     "license": "MIT",
     "extra": {
         "branch-alias": {
-            "dev-master": "1.1-dev"
+            "dev-master": "1.2-dev"
         }
     },
     "authors": [
diff --git a/src/Resources/config/services.yaml b/src/Resources/config/services.yaml
index b8624de..4e4664b 100644
--- a/src/Resources/config/services.yaml
+++ b/src/Resources/config/services.yaml
@@ -6,3 +6,10 @@ services:
             $gatewayFactoryClass: FluxSE\PayumStripe\StripeCheckoutSessionGatewayFactory
         tags:
             - { name: payum.gateway_factory_builder, factory: stripe_checkout_session }
+
+    flux_se.payum_stripe_js.gateway_factory_builder:
+        class: Payum\Core\Bridge\Symfony\Builder\GatewayFactoryBuilder
+        arguments:
+            $gatewayFactoryClass: FluxSE\PayumStripe\StripeJsGatewayFactory
+        tags:
+            - { name: payum.gateway_factory_builder, factory: stripe_js }