diff --git a/firestore-stripe-payments/_emulator/.gitignore b/firestore-stripe-payments/_emulator/.gitignore
new file mode 100644
index 00000000..dbb58ffb
--- /dev/null
+++ b/firestore-stripe-payments/_emulator/.gitignore
@@ -0,0 +1,66 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+firebase-debug.log*
+firebase-debug.*.log*
+
+# Firebase cache
+.firebase/
+
+# Firebase config
+
+# Uncomment this if you'd like others to create their own Firebase project.
+# For a team working on the same Firebase project(s), it is recommended to leave
+# it commented so all members can deploy to the same project(s) in .firebaserc.
+# .firebaserc
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
diff --git a/firestore-stripe-payments/_emulator/extensions/firestore-stripe-payments.secret.local b/firestore-stripe-payments/_emulator/extensions/firestore-stripe-payments.secret.local
index 2ba85d00..b7026f34 100644
--- a/firestore-stripe-payments/_emulator/extensions/firestore-stripe-payments.secret.local
+++ b/firestore-stripe-payments/_emulator/extensions/firestore-stripe-payments.secret.local
@@ -1 +1 @@
-STRIPE_API_KEY=
+STRIPE_API_KEY=
\ No newline at end of file
diff --git a/firestore-stripe-payments/_emulator/firebase.json b/firestore-stripe-payments/_emulator/firebase.json
index 26d2d133..07dacc1a 100755
--- a/firestore-stripe-payments/_emulator/firebase.json
+++ b/firestore-stripe-payments/_emulator/firebase.json
@@ -9,6 +9,9 @@
     "hub": {
       "port": 4000
     },
+    "firestore": {
+      "port": 8080
+    },
     "storage": {
       "port": 9199
     },
@@ -25,5 +28,17 @@
   "firestore": {
     "rules": "firestore.rules",
     "indexes": "firestore.indexes.json"
-  }
+  },
+  "functions": [
+    {
+      "source": "functions",
+      "codebase": "default",
+      "ignore": [
+        "node_modules",
+        ".git",
+        "firebase-debug.log",
+        "firebase-debug.*.log"
+      ]
+    }
+  ]
 }
diff --git a/firestore-stripe-payments/_emulator/functions/.gitignore b/firestore-stripe-payments/_emulator/functions/.gitignore
new file mode 100644
index 00000000..40b878db
--- /dev/null
+++ b/firestore-stripe-payments/_emulator/functions/.gitignore
@@ -0,0 +1 @@
+node_modules/
\ No newline at end of file
diff --git a/firestore-stripe-payments/_emulator/functions/index.js b/firestore-stripe-payments/_emulator/functions/index.js
new file mode 100644
index 00000000..e81477f6
--- /dev/null
+++ b/firestore-stripe-payments/_emulator/functions/index.js
@@ -0,0 +1,19 @@
+/**
+ * Import function triggers from their respective submodules:
+ *
+ * const {onCall} = require("firebase-functions/v2/https");
+ * const {onDocumentWritten} = require("firebase-functions/v2/firestore");
+ *
+ * See a full list of supported triggers at https://firebase.google.com/docs/functions
+ */
+
+const {onRequest} = require("firebase-functions/v2/https");
+const logger = require("firebase-functions/logger");
+
+// Create and deploy your first functions
+// https://firebase.google.com/docs/functions/get-started
+
+// exports.helloWorld = onRequest((request, response) => {
+//   logger.info("Hello logs!", {structuredData: true});
+//   response.send("Hello from Firebase!");
+// });
diff --git a/firestore-stripe-payments/_emulator/functions/package.json b/firestore-stripe-payments/_emulator/functions/package.json
new file mode 100644
index 00000000..392196b9
--- /dev/null
+++ b/firestore-stripe-payments/_emulator/functions/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "functions",
+  "description": "Cloud Functions for Firebase",
+  "scripts": {
+    "serve": "firebase emulators:start --only functions",
+    "shell": "firebase functions:shell",
+    "start": "npm run shell",
+    "deploy": "firebase deploy --only functions",
+    "logs": "firebase functions:log"
+  },
+  "engines": {
+    "node": "18"
+  },
+  "main": "index.js",
+  "dependencies": {
+    "firebase-admin": "^11.8.0",
+    "firebase-functions": "^4.3.1"
+  },
+  "devDependencies": {
+    "firebase-functions-test": "^3.1.0"
+  },
+  "private": true
+}
diff --git a/firestore-stripe-payments/functions/__tests__/helpers/setupEmulator.ts b/firestore-stripe-payments/functions/__tests__/helpers/setupEmulator.ts
index b55f5fff..1c647ec9 100644
--- a/firestore-stripe-payments/functions/__tests__/helpers/setupEmulator.ts
+++ b/firestore-stripe-payments/functions/__tests__/helpers/setupEmulator.ts
@@ -1,5 +1,5 @@
 export default () => {
-  process.env.FIRESTORE_EMULATOR_HOST = 'localhost:8080';
-  process.env.FIREBASE_FIRESTORE_EMULATOR_ADDRESS = 'localhost:8080';
-  process.env.FIREBASE_AUTH_EMULATOR_HOST = 'localhost:9099';
+  process.env.FIRESTORE_EMULATOR_HOST = '127.0.0.1:8080';
+  process.env.FIREBASE_FIRESTORE_EMULATOR_ADDRESS = '127.0.0.1:8080';
+  process.env.FIREBASE_AUTH_EMULATOR_HOST = '127.0.0.1:9099';
 };
diff --git a/firestore-stripe-payments/functions/__tests__/helpers/stripeApi/subscriptions.ts b/firestore-stripe-payments/functions/__tests__/helpers/stripeApi/subscriptions.ts
index 4759d1db..89ac977b 100644
--- a/firestore-stripe-payments/functions/__tests__/helpers/stripeApi/subscriptions.ts
+++ b/firestore-stripe-payments/functions/__tests__/helpers/stripeApi/subscriptions.ts
@@ -29,7 +29,7 @@ export const createRandomSubscription = async (
     card: {
       number: '4242424242424242',
       exp_month: 5,
-      exp_year: 2023,
+      exp_year: new Date().getFullYear() + 1,
       cvc: '314',
     },
   });