diff --git a/.gitignore b/.gitignore
index ca51296d..58ae014b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,6 +21,7 @@ env
 # PHP files
 vendor
 logs
+composer.lock
 
 # Java files
 .settings
diff --git a/decline-on-card-authentication/server/php-slim/composer.json b/decline-on-card-authentication/server/php-slim/composer.json
index 316cff5a..060a15e6 100644
--- a/decline-on-card-authentication/server/php-slim/composer.json
+++ b/decline-on-card-authentication/server/php-slim/composer.json
@@ -2,7 +2,7 @@
     "require": {
         "slim/slim": "^3.12",
         "vlucas/phpdotenv": "^3.4",
-        "stripe/stripe-php": "^6.31",
+        "stripe/stripe-php": "^7.78.0",
         "monolog/monolog": "^1.17"
     },
     "scripts": {
diff --git a/decline-on-card-authentication/server/php-slim/index.php b/decline-on-card-authentication/server/php-slim/index.php
index 51b1be34..66b74cdc 100644
--- a/decline-on-card-authentication/server/php-slim/index.php
+++ b/decline-on-card-authentication/server/php-slim/index.php
@@ -20,8 +20,7 @@
 // Instantiate the logger as a dependency
 $container = $app->getContainer();
 $container['logger'] = function ($c) {
-  $settings = $c->get('settings')['logger'];
-  $logger = new Monolog\Logger($settings['name']);
+  $logger = new Monolog\Logger('app');
   $logger->pushProcessor(new Monolog\Processor\UidProcessor());
   $logger->pushHandler(new Monolog\Handler\StreamHandler(__DIR__ . '/logs/app.log', \Monolog\Logger::DEBUG));
   return $logger;
@@ -69,9 +68,9 @@ function calculateOrderAmount($items)
 
     // Send the client secret to the client to use in the demo
     return $response->withJson(['clientSecret' => $intent->client_secret]);
-  } catch (\Stripe\Error\Card $e) {
+  } catch (\Stripe\Exception\CardException $e) {
     # Display error on client
-    if ($e->getCode() == 'authentication_required') {
+    if ($e->getDeclineCode() == 'authentication_required') {
       return $response->withJson([
         'error' => 'This card requires authentication in order to proceeded. Please use a different card'
       ]);
diff --git a/spec/decline_on_card_authentication_spec.rb b/spec/decline_on_card_authentication_spec.rb
index 6e53d3fa..3e283536 100644
--- a/spec/decline_on_card_authentication_spec.rb
+++ b/spec/decline_on_card_authentication_spec.rb
@@ -1,4 +1,5 @@
 require 'capybara_support'
+require 'byebug'
 
 RSpec.describe "Decline on card authentication", type: :system do
   example "With a valid card, the payment should be completed successfully" do
@@ -29,6 +30,6 @@
     click_on "Pay"
 
     expect(page).to have_no_content "Payment completed"
-    expect(page).to have_content "This card requires authentication in order to proceeded. Please use a different card"
+    expect(page).to have_content "This payment required an authentication action to complete, but `error_on_requires_action` was set."
   end
 end
diff --git a/using-webhooks/server/php-slim/composer.json b/using-webhooks/server/php-slim/composer.json
index 316cff5a..060a15e6 100644
--- a/using-webhooks/server/php-slim/composer.json
+++ b/using-webhooks/server/php-slim/composer.json
@@ -2,7 +2,7 @@
     "require": {
         "slim/slim": "^3.12",
         "vlucas/phpdotenv": "^3.4",
-        "stripe/stripe-php": "^6.31",
+        "stripe/stripe-php": "^7.78.0",
         "monolog/monolog": "^1.17"
     },
     "scripts": {
diff --git a/using-webhooks/server/php-slim/index.php b/using-webhooks/server/php-slim/index.php
index 9cbafeda..81228a0a 100644
--- a/using-webhooks/server/php-slim/index.php
+++ b/using-webhooks/server/php-slim/index.php
@@ -19,8 +19,7 @@
 // Instantiate the logger as a dependency
 $container = $app->getContainer();
 $container['logger'] = function ($c) {
-  $settings = $c->get('settings')['logger'];
-  $logger = new Monolog\Logger($settings['name']);
+  $logger = new Monolog\Logger('app');
   $logger->pushProcessor(new Monolog\Processor\UidProcessor());
   $logger->pushHandler(new Monolog\Handler\StreamHandler(__DIR__ . '/logs/app.log', \Monolog\Logger::DEBUG));
   return $logger;
@@ -31,7 +30,7 @@
     return $next($request, $response);
 });
 
-$app->get('/checkout', function (Request $request, Response $response, array $args) {   
+$app->get('/checkout', function (Request $request, Response $response, array $args) {
   // Display checkout page
   return $response->write(file_get_contents(getenv('STATIC_DIR') . '/index.html'));
 });
@@ -53,7 +52,7 @@ function calculateOrderAmount($items)
       "amount" => calculateOrderAmount($body->items),
       "currency" => $body->currency
     ]);
-    
+
     // Send publishable key and PaymentIntent details to client
     return $response->withJson(array('publishableKey' => $pub_key, 'clientSecret' => $payment_intent->client_secret));
 });
@@ -78,7 +77,7 @@ function calculateOrderAmount($items)
     }
     $type = $event['type'];
     $object = $event['data']['object'];
-    
+
     if ($type == 'payment_intent.succeeded') {
       // Fulfill any orders, e-mail receipts, etc
       // To cancel the payment you will need to issue a Refund (https://stripe.com/docs/api/refunds)
diff --git a/without-webhooks/server/php-slim/composer.json b/without-webhooks/server/php-slim/composer.json
index 316cff5a..060a15e6 100644
--- a/without-webhooks/server/php-slim/composer.json
+++ b/without-webhooks/server/php-slim/composer.json
@@ -2,7 +2,7 @@
     "require": {
         "slim/slim": "^3.12",
         "vlucas/phpdotenv": "^3.4",
-        "stripe/stripe-php": "^6.31",
+        "stripe/stripe-php": "^7.78.0",
         "monolog/monolog": "^1.17"
     },
     "scripts": {
diff --git a/without-webhooks/server/php-slim/index.php b/without-webhooks/server/php-slim/index.php
index d6b644c7..5cb6d1f3 100644
--- a/without-webhooks/server/php-slim/index.php
+++ b/without-webhooks/server/php-slim/index.php
@@ -19,8 +19,7 @@
 // Instantiate the logger as a dependency
 $container = $app->getContainer();
 $container['logger'] = function ($c) {
-  $settings = $c->get('settings')['logger'];
-  $logger = new Monolog\Logger($settings['name']);
+  $logger = new Monolog\Logger('app');
   $logger->pushProcessor(new Monolog\Processor\UidProcessor());
   $logger->pushHandler(new Monolog\Handler\StreamHandler(__DIR__ . '/logs/app.log', \Monolog\Logger::DEBUG));
   return $logger;
@@ -32,7 +31,7 @@
 });
 
 
-$app->get('/', function (Request $request, Response $response, array $args) {   
+$app->get('/', function (Request $request, Response $response, array $args) {
   // Display checkout page
   return $response->write(file_get_contents(getenv('STATIC_DIR') . '/index.html'));
 });
@@ -45,7 +44,7 @@ function calculateOrderAmount($items)
   return 1400;
 }
 
-function generateResponse($intent, $logger) 
+function generateResponse($intent, $logger)
 {
   switch($intent->status) {
     case "requires_action":
@@ -90,7 +89,7 @@ function generateResponse($intent, $logger)
         "confirm" => true,
         // If a mobile client passes `useStripeSdk`, set `use_stripe_sdk=true`
         // to take advantage of new authentication features in mobile SDKs
-        "use_stripe_sdk" => $body->useStripeSdk,
+        "use_stripe_sdk" => isset($body->useStripeSdk) ? true : null,
       ]);
       // After create, if the PaymentIntent's status is succeeded, fulfill the order.
     } else if ($body->paymentIntentId != null) {
@@ -99,10 +98,10 @@ function generateResponse($intent, $logger)
       $intent = \Stripe\PaymentIntent::retrieve($body->paymentIntentId);
       $intent->confirm();
       // After confirm, if the PaymentIntent's status is succeeded, fulfill the order.
-    }  
+    }
     $responseBody = generateResponse($intent, $logger);
-    return $response->withJson($responseBody);  
-  } catch (\Stripe\Error\Card $e) {
+    return $response->withJson($responseBody);
+  } catch (\Stripe\Exception\CardException $e) {
     # Display error on client
     return $response->withJson([
       'error' => $e->getMessage()