diff --git a/.changeset/workflow-button-action-id.md b/.changeset/workflow-button-action-id.md
new file mode 100644
index 000000000..4f07855c2
--- /dev/null
+++ b/.changeset/workflow-button-action-id.md
@@ -0,0 +1,5 @@
+---
+"@slack/types": patch
+---
+
+fix(types): include `action_id` in `WorkflowButton`
diff --git a/packages/types/src/block-kit/block-elements.ts b/packages/types/src/block-kit/block-elements.ts
index 6fe6a127d..87c59e6a2 100644
--- a/packages/types/src/block-kit/block-elements.ts
+++ b/packages/types/src/block-kit/block-elements.ts
@@ -728,7 +728,7 @@ export interface URLSourceElement {
  * @description Allows users to run a {@link https://docs.slack.dev/tools/deno-slack-sdk/guides/creating-link-triggers/#workflow_buttons link trigger} with customizable inputs.
  * @see {@link https://docs.slack.dev/reference/block-kit/block-elements/workflow-button-element Workflow button element reference}.
  */
-export interface WorkflowButton extends Confirmable {
+export interface WorkflowButton extends Actionable, Confirmable {
   /**
    * @description The type of element. In this case `type` is always `workflow_button`.
    */
diff --git a/packages/types/test/block-elements.test-d.ts b/packages/types/test/block-elements.test-d.ts
index 020149637..21570d2c5 100644
--- a/packages/types/test/block-elements.test-d.ts
+++ b/packages/types/test/block-elements.test-d.ts
@@ -1,5 +1,20 @@
 import { expectAssignable, expectError } from 'tsd';
-import type { RichTextInput } from '../src/index';
+import type { RichTextInput, WorkflowButton } from '../src/index';
+
+// WorkflowButton happy path
+expectAssignable<WorkflowButton>({
+  type: 'workflow_button',
+  text: {
+    type: 'plain_text',
+    text: 'Run workflow',
+  },
+  action_id: 'run_workflow',
+  workflow: {
+    trigger: {
+      url: 'https://example.com/trigger',
+    },
+  },
+});
 
 // RichTextInput — happy paths
 expectAssignable<RichTextInput>({