diff --git a/src/helpers.ts b/src/helpers.ts
index 81c1786e2..bb3ae1346 100644
--- a/src/helpers.ts
+++ b/src/helpers.ts
@@ -50,7 +50,7 @@ export function getTypeAndConversation(body: any): { type?: IncomingEventType, c
       conversationId: optionsBody.channel !== undefined ? optionsBody.channel.id : undefined,
     };
   }
-  if (body.actions !== undefined || body.type === 'dialog_submission') {
+  if (body.actions !== undefined || body.type === 'dialog_submission' || body.type === 'workflow_step_edit') {
     const actionBody = (body as SlackActionMiddlewareArgs<SlackAction>['body']);
     return {
       type: IncomingEventType.Action,
diff --git a/src/types/actions/index.ts b/src/types/actions/index.ts
index 18dd3c71f..90f6bff83 100644
--- a/src/types/actions/index.ts
+++ b/src/types/actions/index.ts
@@ -4,6 +4,7 @@ export * from './dialog-action';
 
 import { BlockAction } from './block-action';
 import { InteractiveMessage } from './interactive-message';
+import { WorkflowStepEdit } from './workflow-step-edit';
 import { DialogSubmitAction, DialogValidation } from './dialog-action';
 import { SayFn, SayArguments, RespondFn, AckFn } from '../utilities';
 
@@ -21,7 +22,7 @@ import { SayFn, SayArguments, RespondFn, AckFn } from '../utilities';
  * offered when no generic parameter is bound would be limited to BasicElementAction rather than the union of known
  * actions - ElementAction.
  */
-export type SlackAction = BlockAction | InteractiveMessage | DialogSubmitAction;
+export type SlackAction = BlockAction | InteractiveMessage | DialogSubmitAction | WorkflowStepEdit;
 
 /**
  * Arguments which listeners and middleware receive to process an action from Slack's Block Kit interactive components,
@@ -40,7 +41,7 @@ export interface SlackActionMiddlewareArgs<Action extends SlackAction = SlackAct
   action: this['payload'];
   body: Action;
   // all action types except dialog submission have a channel context
-  say: Action extends Exclude<SlackAction, DialogSubmitAction> ? SayFn : never;
+  say: Action extends Exclude<SlackAction, DialogSubmitAction | WorkflowStepEdit> ? SayFn : never;
   respond: RespondFn;
   ack: ActionAckFn<Action>;
 }
diff --git a/src/types/actions/workflow-step-edit.ts b/src/types/actions/workflow-step-edit.ts
new file mode 100644
index 000000000..5d0ed8b84
--- /dev/null
+++ b/src/types/actions/workflow-step-edit.ts
@@ -0,0 +1,33 @@
+/**
+ * A Slack workflow step action wrapped in the standard metadata.
+ *
+ * This describes the entire JSON-encoded body of a request from Slack workflow step actions.
+ */
+export interface WorkflowStepEdit {
+  type: 'workflow_step_edit';
+  callback_id: string;
+  trigger_id: string;
+  user: {
+    id: string;
+    username: string;
+    team_id?: string; // undocumented
+  };
+  team: {
+    id: string;
+    domain: string;
+    enterprise_id?: string; // undocumented
+    enterprise_name?: string; // undocumented
+  };
+  channel?: {
+    id?: string;
+    name?: string;
+  };
+  token: string;
+  action_ts: string; // undocumented
+  workflow_step: {
+    workflow_id: string;
+    step_id: string;
+    inputs: object;
+    outputs: [];
+  };
+}
diff --git a/src/types/events/base-events.ts b/src/types/events/base-events.ts
index fdadc54be..7b0a5bfda 100644
--- a/src/types/events/base-events.ts
+++ b/src/types/events/base-events.ts
@@ -66,7 +66,8 @@ export type SlackEvent =
   | TeamJoinEvent
   | TeamRenameEvent
   | TokensRevokedEvent
-  | UserChangeEvent;
+  | UserChangeEvent
+  | WorkflowStepExecuteEvent;
 
 /**
  * Any event in Slack's Events API
@@ -736,5 +737,23 @@ export interface UserChangeEvent extends StringIndexed {
   };
 }
 
+export interface WorkflowStepExecuteEvent extends StringIndexed {
+  type: 'workflow_step_execute';
+  callback_id: string;
+  workflow_step: {
+    workflow_step_execute_id: string;
+    workflow_id: string;
+    workflow_instance_id: string;
+    step_id: string;
+    inputs: object;
+    outputs: {
+      name: string;
+      type: string;
+      label: string;
+    }[];
+  };
+  event_ts: string;
+}
+
 // NOTE: `user_resourced_denied`, `user_resource_granted`, `user_resourced_removed` are left out because they are
 // deprecated as part of the Workspace Apps Developer Preview