diff --git a/app-nest/src/bolt/types/bolt-action-types.ts b/app-nest/src/bolt/types/bolt-action-types.ts
new file mode 100644
index 0000000..ff1d2f9
--- /dev/null
+++ b/app-nest/src/bolt/types/bolt-action-types.ts
@@ -0,0 +1,9 @@
+import {
+  AllMiddlewareArgs,
+  SlackAction,
+  SlackActionMiddlewareArgs,
+} from "@slack/bolt";
+import { StringIndexed } from "@slack/bolt/dist/types/helpers";
+
+export type BoltActionArgs = SlackActionMiddlewareArgs<SlackAction> &
+  AllMiddlewareArgs<StringIndexed>;
diff --git a/app-nest/src/bolt/types/bolt-event-types.ts b/app-nest/src/bolt/types/bolt-event-types.ts
new file mode 100644
index 0000000..9d73a77
--- /dev/null
+++ b/app-nest/src/bolt/types/bolt-event-types.ts
@@ -0,0 +1,17 @@
+import {
+  AllMiddlewareArgs,
+  AppHomeOpenedEvent,
+  SlackEventMiddlewareArgs,
+  UserProfileChangedEvent,
+} from "@slack/bolt";
+import { StringIndexed } from "@slack/bolt/dist/types/helpers";
+
+export type AppHomeOpenedArgs = SlackEventMiddlewareArgs<
+  AppHomeOpenedEvent["type"]
+> &
+  AllMiddlewareArgs<StringIndexed>;
+
+export type UserProfileChangedArgs = SlackEventMiddlewareArgs<
+  UserProfileChangedEvent["type"]
+> &
+  AllMiddlewareArgs<StringIndexed>;
diff --git a/app-nest/src/dev-tools/dev-tools.controller.ts b/app-nest/src/dev-tools/dev-tools.controller.ts
index 17096c4..5d8ecb5 100644
--- a/app-nest/src/dev-tools/dev-tools.controller.ts
+++ b/app-nest/src/dev-tools/dev-tools.controller.ts
@@ -1,6 +1,7 @@
 import { Controller } from "@nestjs/common";
 import BoltAction from "../bolt/decorators/bolt-action.decorator";
 import BoltActions from "../bolt/enums/bolt-actions.enum";
+import { BoltActionArgs } from "../bolt/types/bolt-action-types";
 import { UserSyncService } from "../sync/user-sync.service";
 
 @Controller()
@@ -8,7 +9,7 @@ export class DevToolsController {
   constructor(private userSyncService: UserSyncService) {}
 
   @BoltAction(BoltActions.SYNC_USERS)
-  async syncUsers({ ack }) {
+  async syncUsers({ ack }: BoltActionArgs) {
     await ack();
     await this.userSyncService.syncUsers();
   }
diff --git a/app-nest/src/gui/tabs/home-tab.controller.ts b/app-nest/src/gui/tabs/home-tab.controller.ts
index 5f0ad8a..f1a781b 100644
--- a/app-nest/src/gui/tabs/home-tab.controller.ts
+++ b/app-nest/src/gui/tabs/home-tab.controller.ts
@@ -1,6 +1,7 @@
 import { Controller } from "@nestjs/common";
 import BoltEvent from "../../bolt/decorators/bolt-event.decorator";
 import BoltEvents from "../../bolt/enums/bolt-events.enum";
+import { AppHomeOpenedArgs } from "../../bolt/types/bolt-event-types";
 import { UserService } from "../../entities/user/user.service";
 import devTools from "../dev/dev-tools";
 
@@ -9,7 +10,7 @@ export class HomeTabController {
   constructor(private userService: UserService) {}
 
   @BoltEvent(BoltEvents.APP_HOME_OPENED)
-  async getView({ event, client, logger }) {
+  async getView({ event, client, logger }: AppHomeOpenedArgs) {
     const users = await this.userService.findAll();
     const { slackId } = users[0];
 
diff --git a/app-nest/src/sync/sync.controller.ts b/app-nest/src/sync/sync.controller.ts
index c3f41da..8121dd0 100644
--- a/app-nest/src/sync/sync.controller.ts
+++ b/app-nest/src/sync/sync.controller.ts
@@ -1,6 +1,7 @@
 import { Controller } from "@nestjs/common";
 import BoltEvent from "../bolt/decorators/bolt-event.decorator";
 import BoltEvents from "../bolt/enums/bolt-events.enum";
+import { UserProfileChangedArgs } from "../bolt/types/bolt-event-types";
 import { UserSyncService } from "./user-sync.service";
 
 @Controller()
@@ -8,7 +9,7 @@ export class SyncController {
   constructor(private userSyncService: UserSyncService) {}
 
   @BoltEvent(BoltEvents.USER_PROFILE_CHANGED)
-  async userProfileChanged({ event }) {
+  async userProfileChanged({ event }: UserProfileChangedArgs) {
     await this.userSyncService.syncUsers(event.user);
   }
 }