diff --git a/.changeset/afraid-candles-enjoy.md b/.changeset/afraid-candles-enjoy.md
new file mode 100644
index 00000000..efd62d7a
--- /dev/null
+++ b/.changeset/afraid-candles-enjoy.md
@@ -0,0 +1,5 @@
+---
+"@defer/client": minor
+---
+
+Remove running state
diff --git a/.changeset/brave-jars-yawn.md b/.changeset/brave-jars-yawn.md
new file mode 100644
index 00000000..eb91db5f
--- /dev/null
+++ b/.changeset/brave-jars-yawn.md
@@ -0,0 +1,15 @@
+---
+"@defer/client": minor
+---
+
+Add cancel execution:
+
+```ts
+import { cancelExecution } from "@defer/client";
+
+// ...
+
+const { id } = await cancelExecution(executionId);
+
+// ...
+```
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 913d395c..8cc7ff58 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,6 +11,7 @@ jobs:
     name: "Node ${{matrix.node_version}}"
     runs-on: "ubuntu-latest"
     strategy:
+      fail-fast: false
       matrix:
         node-version: [16, 18, 20]
     steps:
diff --git a/package.json b/package.json
index a301d396..284414e6 100644
--- a/package.json
+++ b/package.json
@@ -96,4 +96,4 @@
     "directory": "dist",
     "access": "public"
   }
-}
\ No newline at end of file
+}
diff --git a/src/cancelExecution.ts b/src/cancelExecution.ts
new file mode 100644
index 00000000..e97e7162
--- /dev/null
+++ b/src/cancelExecution.ts
@@ -0,0 +1,13 @@
+import {
+  cancelExecution as cancelExecution2,
+  CancelExecutionResponse,
+} from "./client.js";
+import { __httpClient } from "./index.js";
+
+export async function cancelExecution(
+  id: string
+): Promise<CancelExecutionResponse> {
+  if (__httpClient) return cancelExecution2(__httpClient, { id });
+
+  return {};
+}
diff --git a/src/client.ts b/src/client.ts
index 21b826f0..a0facd62 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -18,12 +18,7 @@ export interface FetchExecutionRequest {
   id: string;
 }
 
-export type ExecutionState =
-  | "running"
-  | "created"
-  | "failed"
-  | "succeed"
-  | "started";
+export type ExecutionState = "created" | "failed" | "succeed" | "started";
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export interface FetchExecutionResponse<R = any> {
@@ -37,6 +32,20 @@ export type PoolExecutionRequest = FetchExecutionRequest;
 
 export type PoolExecutionResponse = FetchExecutionResponse;
 
+export type CancelExecutionRequest = FetchExecutionRequest;
+
+export interface CancelExecutionResponse {}
+
+export function cancelExecution(
+  client: HTTPClient,
+  request: CancelExecutionRequest
+): Promise<CancelExecutionResponse> {
+  return client<CancelExecutionResponse>(
+    "POST",
+    `/public/v1/executions/${request.id}/cancel`
+  );
+}
+
 export function enqueueExecution(
   client: HTTPClient,
   request: EnqueueExecutionRequest
diff --git a/src/getExecution.ts b/src/getExecution.ts
index 5b1a86a9..47728b29 100644
--- a/src/getExecution.ts
+++ b/src/getExecution.ts
@@ -13,9 +13,8 @@ export async function getExecution(
   if (response)
     return Promise.resolve({
       ...response,
-      // TODO: bump a major and drop `running` state (invalid API state)
-      state: response.state === "started" ? "running" : response.state,
+      state: response.state,
     });
 
-  throw new APIError("execution not found", "");
+  throw new APIError("execution not found", "not found");
 }
diff --git a/src/index.ts b/src/index.ts
index 2915f92c..a4d031db 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -16,6 +16,7 @@ import { DeferError } from "./errors.js";
 import { HTTPClient, makeHTTPClient } from "./httpClient.js";
 
 export { getExecution } from "./getExecution.js";
+export { cancelExecution } from "./cancelExecution.js";
 
 interface Options {
   accessToken?: string;
@@ -251,7 +252,7 @@ export const defer: Defer = (fn, options) => {
       console.log(`[defer.run][${fn.name}] defer ignore, no token found.`);
 
     const id = randomUUID();
-    __database.set(id, { id: id, state: "running" });
+    __database.set(id, { id: id, state: "started" });
     execLocally(id, fn, functionArguments);
     return { id };
   };
@@ -334,7 +335,7 @@ export const delay: DeferDelay = (deferFn, delay) => {
       console.log(`[defer.run][${fn.name}] defer ignore, no token found.`);
 
     const id = randomUUID();
-    __database.set(id, { id: id, state: "running" });
+    __database.set(id, { id: id, state: "started" });
     execLocally(id, fn, functionArguments);
     return { id };
   };
@@ -403,7 +404,7 @@ export const addMetadata: DeferAddMetadata = (deferFn, metadata) => {
       console.log(`[defer.run][${fn.name}] defer ignore, no token found.`);
 
     const id = randomUUID();
-    __database.set(id, { id: id, state: "running" });
+    __database.set(id, { id: id, state: "started" });
     execLocally(id, fn, functionArguments);
     return { id };
   };
@@ -455,7 +456,7 @@ export const awaitResult: DeferAwaitResult =
       response = await waitExecutionResult(__httpClient, { id: id });
     } else {
       const id = randomUUID();
-      __database.set(id, { id: id, state: "running" });
+      __database.set(id, { id: id, state: "started" });
       response = await execLocally(id, fn, functionArguments);
     }
 
diff --git a/src/next/useDeferRoute.ts b/src/next/useDeferRoute.ts
index 9c7de909..52ec3fa8 100644
--- a/src/next/useDeferRoute.ts
+++ b/src/next/useDeferRoute.ts
@@ -77,7 +77,7 @@ export const useDeferRoute = <
   return [
     execute,
     {
-      loading: !!status && ["started", "created", "running"].includes(status),
+      loading: !!status && ["started", "created"].includes(status),
       result,
       error,
     },
diff --git a/src/version.ts b/src/version.ts
index 9e9329c2..436eb765 100644
--- a/src/version.ts
+++ b/src/version.ts
@@ -1 +1 @@
-export default "1.7.2";
+export default "unknow";
diff --git a/tests/awaitResult.spec.ts b/tests/awaitResult.spec.ts
index 670fb785..ca3d095a 100644
--- a/tests/awaitResult.spec.ts
+++ b/tests/awaitResult.spec.ts
@@ -31,7 +31,7 @@ describe("awaitResult(deferFn)", () => {
           })
           // second `/runs/:id` call
           .mockImplementationOnce(() => {
-            return { id: "1", state: "running" };
+            return { id: "1", state: "started" };
           })
           // third `/runs/:id` call
           .mockImplementationOnce(() => {