diff --git a/lib/plugins/aws/package/compile/events/websockets/lib/deployment.js b/lib/plugins/aws/package/compile/events/websockets/lib/deployment.js
index 9e93c30e7..4af927e2c 100644
--- a/lib/plugins/aws/package/compile/events/websockets/lib/deployment.js
+++ b/lib/plugins/aws/package/compile/events/websockets/lib/deployment.js
@@ -13,7 +13,8 @@ module.exports = {
       this.serverless.instanceId
     );
 
-    _.merge(this.serverless.service.provider.compiledCloudFormationTemplate.Resources, {
+    const resources = this.serverless.service.provider.compiledCloudFormationTemplate.Resources;
+    _.merge(resources, {
       [this.websocketsDeploymentLogicalId]: {
         Type: 'AWS::ApiGatewayV2::Deployment',
         DependsOn: routeLogicalIds,
@@ -26,9 +27,7 @@ module.exports = {
     });
     const { apiGateway } = this.serverless.service.provider;
     if (apiGateway && apiGateway.websocketApiId) {
-      this.serverless.service.provider.compiledCloudFormationTemplate.Resources[
-        this.websocketsDeploymentLogicalId
-      ].Properties.StageName = this.provider.getStage();
+      resources[this.websocketsDeploymentLogicalId].Properties.StageName = this.provider.getStage();
     }
 
     _.merge(this.serverless.service.provider.compiledCloudFormationTemplate.Outputs, {