diff --git a/typescript-sdk/examples/concurrency/concurrency-event.ts b/typescript-sdk/examples/concurrency/concurrency-event.ts
index b95f3b411..cc32423c6 100644
--- a/typescript-sdk/examples/concurrency/concurrency-event.ts
+++ b/typescript-sdk/examples/concurrency/concurrency-event.ts
@@ -2,6 +2,25 @@ import Hatchet from '../../src/sdk';
 
 const hatchet = Hatchet.init();
 
-hatchet.event.push('concurrency:create', {
-  test: 'test',
-});
+const sleep = (ms: number) =>
+  new Promise((resolve) => {
+    setTimeout(resolve, ms);
+  });
+
+async function main() {
+  hatchet.event.push('concurrency:created', {
+    data: 'event 1',
+  });
+
+  // step 1 will wait 5000 ms,
+  // so sending a second event
+  // before that will cancel
+  // the first run and run the second event
+  await sleep(1000);
+
+  hatchet.event.push('concurrency:create', {
+    data: 'event 2',
+  });
+}
+
+main();
diff --git a/typescript-sdk/examples/concurrency/concurrency-worker.ts b/typescript-sdk/examples/concurrency/concurrency-worker.ts
index 759e76d82..1974d1e1d 100644
--- a/typescript-sdk/examples/concurrency/concurrency-worker.ts
+++ b/typescript-sdk/examples/concurrency/concurrency-worker.ts
@@ -12,7 +12,7 @@ const workflow: Workflow = {
   id: 'concurrency-example',
   description: 'test',
   on: {
-    event: 'concurrency:create',
+    event: 'concurrency:created',
   },
   concurrency: {
     key: (ctx) => ctx.workflowInput().userId,
@@ -21,10 +21,11 @@ const workflow: Workflow = {
     {
       name: 'step1',
       run: async (ctx) => {
-        console.log('starting step1 and waiting 5 seconds...');
+        const { data } = ctx.workflowInput();
+        console.log('starting step1 and waiting 5 seconds...', data);
         await sleep(5000);
         console.log('executed step1!');
-        return { step1: 'step1 results!' };
+        return { step1: `step1 results for ${data}!` };
       },
     },
     {
diff --git a/typescript-sdk/src/clients/worker/worker.ts b/typescript-sdk/src/clients/worker/worker.ts
index f95154d92..39fc0f33d 100644
--- a/typescript-sdk/src/clients/worker/worker.ts
+++ b/typescript-sdk/src/clients/worker/worker.ts
@@ -10,7 +10,11 @@ import {
 } from '@hatchet/protoc/dispatcher';
 import HatchetPromise from '@util/hatchet-promise/hatchet-promise';
 import { Workflow } from '@hatchet/workflow';
-import { CreateWorkflowStepOpts, WorkflowConcurrencyOpts } from '@hatchet/protoc/workflows';
+import {
+  ConcurrencyLimitStrategy,
+  CreateWorkflowStepOpts,
+  WorkflowConcurrencyOpts,
+} from '@hatchet/protoc/workflows';
 import { Logger } from '@hatchet/util/logger';
 import sleep from '@hatchet/util/sleep';
 import { Context } from '../../step';
@@ -25,6 +29,7 @@ export class Worker {
   handle_kill: boolean;
 
   action_registry: ActionRegistry;
+  concurrency_action_registry: ActionRegistry;
   listener: ActionListener | undefined;
   futures: Record<Action['stepRunId'], HatchetPromise<any>> = {};
   contexts: Record<Action['stepRunId'], Context<any>> = {};
@@ -35,6 +40,7 @@ export class Worker {
     this.client = client;
     this.name = options.name;
     this.action_registry = {};
+    this.concurrency_action_registry = {};
 
     process.on('SIGTERM', () => this.exitGracefully());
     process.on('SIGINT', () => this.exitGracefully());
@@ -47,7 +53,14 @@ export class Worker {
 
   async registerWorkflow(workflow: Workflow) {
     try {
-      const concurrency: WorkflowConcurrencyOpts | undefined = undefined;
+      const concurrency: WorkflowConcurrencyOpts | undefined = workflow.concurrency?.action
+        ? {
+            action: `${this.serviceName}:${workflow.concurrency.action}`,
+            maxRuns: workflow.concurrency.maxRuns || 1,
+            limitStrategy:
+              workflow.concurrency.limitStrategy || ConcurrencyLimitStrategy.CANCEL_IN_PROGRESS,
+          }
+        : undefined;
 
       await this.client.admin.put_workflow({
         name: workflow.id,
@@ -80,6 +93,12 @@ export class Worker {
       acc[`${this.serviceName}:${step.name}`] = step.run;
       return acc;
     }, {});
+
+    this.concurrency_action_registry = workflow.concurrency?.action
+      ? {
+          [`${this.serviceName}:${workflow.concurrency.action}`]: workflow.concurrency.key,
+        }
+      : {};
   }
 
   handleStartStepRun(action: Action) {
@@ -308,7 +327,9 @@ export class Worker {
         this.logger.info(`Worker ${this.name} listening for actions`);
 
         for await (const action of generator) {
-          this.logger.info(`Worker ${this.name} received action ${action.actionId}`);
+          this.logger.info(
+            `Worker ${this.name} received action ${action.actionId}:${action.actionType}`
+          );
 
           if (action.actionType === ActionType.START_STEP_RUN) {
             this.handleStartStepRun(action);
diff --git a/typescript-sdk/src/workflow.ts b/typescript-sdk/src/workflow.ts
index 9f6dbdbd2..afcee5aa6 100644
--- a/typescript-sdk/src/workflow.ts
+++ b/typescript-sdk/src/workflow.ts
@@ -40,7 +40,7 @@ export const CreateWorkflowSchema = z.object({
 
 export interface Workflow extends z.infer<typeof CreateWorkflowSchema> {
   concurrency?: z.infer<typeof WorkflowConcurrency> & {
-    key: string | ((ctx: any) => string);
+    key: (ctx: any) => string;
   };
   steps: CreateStep<any>[];
 }