diff --git a/src/api/pipelineRuns.js b/src/api/pipelineRuns.js
index 135730988..7ae90add6 100644
--- a/src/api/pipelineRuns.js
+++ b/src/api/pipelineRuns.js
@@ -1,5 +1,5 @@
 /*
-Copyright 2019-2023 The Tekton Authors
+Copyright 2019-2024 The Tekton Authors
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
@@ -95,8 +95,10 @@ export function getPipelineRunPayload({
   timeoutsPipeline,
   timeoutsTasks
 }) {
+  const pipelinesAPIVersion = getTektonPipelinesAPIVersion();
+
   const payload = {
-    apiVersion: `tekton.dev/${getTektonPipelinesAPIVersion()}`,
+    apiVersion: `tekton.dev/${pipelinesAPIVersion}`,
     kind: 'PipelineRun',
     metadata: {
       name: pipelineRunName,
@@ -128,7 +130,13 @@ export function getPipelineRunPayload({
     };
   }
   if (serviceAccount) {
-    payload.spec.serviceAccountName = serviceAccount;
+    if (pipelinesAPIVersion === 'v1') {
+      payload.spec.taskRunTemplate = {
+        serviceAccountName: serviceAccount
+      };
+    } else {
+      payload.spec.serviceAccountName = serviceAccount;
+    }
   }
   if (timeoutsFinally || timeoutsPipeline || timeoutsTasks) {
     payload.spec.timeouts = {
diff --git a/src/api/pipelineRuns.test.js b/src/api/pipelineRuns.test.js
index 2396a7f56..e3738d298 100644
--- a/src/api/pipelineRuns.test.js
+++ b/src/api/pipelineRuns.test.js
@@ -1,5 +1,5 @@
 /*
-Copyright 2019-2023 The Tekton Authors
+Copyright 2019-2024 The Tekton Authors
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
@@ -74,7 +74,9 @@ describe('createPipelineRun', () => {
           name,
           value: params[name]
         })),
-        serviceAccountName: serviceAccount,
+        taskRunTemplate: {
+          serviceAccountName: serviceAccount
+        },
         timeouts: {
           pipeline: timeout
         }
@@ -128,7 +130,9 @@ describe('createPipelineRun', () => {
             disk: 'ssd'
           }
         },
-        serviceAccountName: serviceAccount,
+        taskRunTemplate: {
+          serviceAccountName: serviceAccount
+        },
         timeouts: {
           pipeline: timeout
         }