diff --git a/kubernetes-manifests/paymentservice.yaml b/kubernetes-manifests/paymentservice.yaml
index 47523a9..fa62c08 100644
--- a/kubernetes-manifests/paymentservice.yaml
+++ b/kubernetes-manifests/paymentservice.yaml
@@ -31,6 +31,9 @@ spec:
         image: paymentservice
         ports:
         - containerPort: 50051
+        env:
+        - name: PORT
+          value: "50051"
         readinessProbe:
           exec:
             command: ["/bin/grpc_health_probe", "-addr=:50051"]
diff --git a/src/paymentservice/server.js b/src/paymentservice/server.js
index 11598b7..152a8d1 100644
--- a/src/paymentservice/server.js
+++ b/src/paymentservice/server.js
@@ -27,7 +27,7 @@ const logger = pino({
 });
 
 class HipsterShopServer {
-  constructor (protoRoot, port = HipsterShopServer.DEFAULT_PORT) {
+  constructor (protoRoot, port = HipsterShopServer.PORT) {
     this.port = port;
 
     this.packages = {
@@ -99,6 +99,6 @@ class HipsterShopServer {
   }
 }
 
-HipsterShopServer.DEFAULT_PORT = 50051;
+HipsterShopServer.PORT = process.env.PORT;
 
 module.exports = HipsterShopServer;