diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..8ac6b8c
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
diff --git a/.github/workflows/deno.yml b/.github/workflows/deno.yml
index 1b288e3..a0a3966 100644
--- a/.github/workflows/deno.yml
+++ b/.github/workflows/deno.yml
@@ -2,9 +2,11 @@ name: Deno app build and testing
 
 on:
   push:
-    branches: [ main ]
+    branches:
+      - main
   pull_request:
-    branches: [ main ]
+    branches:
+      - main
 
 jobs:
   deno:
@@ -18,7 +20,7 @@ jobs:
       - name: Setup Deno
         uses: denoland/setup-deno@v1
         with:
-          deno-version: v1.x
+          deno-version: v2.x
 
       - name: Verify formatting
         run: deno fmt --check
diff --git a/.gitignore b/.gitignore
index 68dfaa9..1ca605b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,3 @@
 dist
 package
 .DS_Store
-.slack/apps.dev.json
diff --git a/.slack/.gitignore b/.slack/.gitignore
new file mode 100644
index 0000000..973ba60
--- /dev/null
+++ b/.slack/.gitignore
@@ -0,0 +1,2 @@
+apps.dev.json
+cache/
diff --git a/.slack/apps.json b/.slack/apps.json
deleted file mode 100644
index 0967ef4..0000000
--- a/.slack/apps.json
+++ /dev/null
@@ -1 +0,0 @@
-{}
diff --git a/slack.json b/.slack/hooks.json
similarity index 100%
rename from slack.json
rename to .slack/hooks.json
diff --git a/README.md b/README.md
index 6f3af7d..1bd2718 100644
--- a/README.md
+++ b/README.md
@@ -157,6 +157,10 @@ $ slack activity --tail
 Contains `apps.dev.json` and `apps.json`, which include installation details for
 development and deployed apps.
 
+Contains `hooks.json` used by the CLI to interact with the project's SDK
+dependencies. It contains script hooks that are executed by the CLI and
+implemented by the SDK.
+
 ### `datastores/`
 
 [Datastores](https://api.slack.com/automation/datastores) securely store data
@@ -189,11 +193,6 @@ continuing to the next step.
 The [app manifest](https://api.slack.com/automation/manifest) contains the app's
 configuration. This file defines attributes like app name and description.
 
-### `slack.json`
-
-Used by the CLI to interact with the project's SDK dependencies. It contains
-script hooks that are executed by the CLI and implemented by the SDK.
-
 ## Resources
 
 To learn more about developing automations on Slack, visit the following:
diff --git a/deno.jsonc b/deno.jsonc
index 56029c4..535414b 100644
--- a/deno.jsonc
+++ b/deno.jsonc
@@ -1,5 +1,5 @@
 {
-  "$schema": "https://deno.land/x/deno/cli/schemas/config-file.v1.json",
+  "$schema": "https://raw.githubusercontent.com/denoland/deno/main/cli/schemas/config-file.v1.json",
   "fmt": {
     "include": [
       "README.md",
@@ -13,7 +13,6 @@
       "workflows"
     ]
   },
-  "importMap": "import_map.json",
   "lint": {
     "include": [
       "datastores",
@@ -28,6 +27,12 @@
   },
   "lock": false,
   "tasks": {
-    "test": "deno fmt --check && deno lint && deno test --allow-read --allow-none"
+    "test": "deno fmt --check && deno lint && deno test --allow-read"
+  },
+  "imports": {
+    "@std/assert": "jsr:@std/assert@^1.0.13",
+    "@std/testing": "jsr:@std/testing@^1.0.12",
+    "deno-slack-sdk/": "https://deno.land/x/deno_slack_sdk@2.15.0/",
+    "deno-slack-api/": "https://deno.land/x/deno_slack_api@2.8.0/"
   }
 }
diff --git a/functions/send_time_off_request_to_manager/blocks.ts b/functions/send_time_off_request_to_manager/blocks.ts
index 2b34dc5..2ed9fec 100644
--- a/functions/send_time_off_request_to_manager/blocks.ts
+++ b/functions/send_time_off_request_to_manager/blocks.ts
@@ -9,7 +9,7 @@ export default function timeOffRequestHeaderBlocks(inputs: any): any[] {
       type: "header",
       text: {
         type: "plain_text",
-        text: `A new time-off request has been submitted`,
+        text: "A new time-off request has been submitted",
       },
     },
     {
diff --git a/functions/send_time_off_request_to_manager/blocks_test.ts b/functions/send_time_off_request_to_manager/blocks_test.ts
index e556f1a..26adbe0 100644
--- a/functions/send_time_off_request_to_manager/blocks_test.ts
+++ b/functions/send_time_off_request_to_manager/blocks_test.ts
@@ -1,7 +1,7 @@
-import { assertEquals } from "https://deno.land/std@0.153.0/testing/asserts.ts";
+import { assertEquals } from "@std/assert";
 import timeOffRequestHeaderBlocks from "./blocks.ts";
 
-Deno.test("timeOffRequestHeaderBlocks generates valid blocks for inputs without reason", async () => {
+Deno.test("timeOffRequestHeaderBlocks generates valid blocks for inputs without reason", () => {
   const expectedBlocks = [
     {
       type: "header",
@@ -17,7 +17,7 @@ Deno.test("timeOffRequestHeaderBlocks generates valid blocks for inputs without
     },
     { type: "section", text: { type: "mrkdwn", text: "*Reason:* N/A" } },
   ];
-  const blocks = await timeOffRequestHeaderBlocks({
+  const blocks = timeOffRequestHeaderBlocks({
     employee: "U12345",
     start_date: "2022-03-01",
     end_date: "2022-03-10",
@@ -25,7 +25,7 @@ Deno.test("timeOffRequestHeaderBlocks generates valid blocks for inputs without
   assertEquals(blocks, expectedBlocks);
 });
 
-Deno.test("timeOffRequestHeaderBlocks generates valid blocks for full inputs", async () => {
+Deno.test("timeOffRequestHeaderBlocks generates valid blocks for full inputs", () => {
   const expectedBlocks = [
     {
       type: "header",
@@ -44,7 +44,7 @@ Deno.test("timeOffRequestHeaderBlocks generates valid blocks for full inputs", a
       text: { type: "mrkdwn", text: "*Reason:* On vacation!" },
     },
   ];
-  const blocks = await timeOffRequestHeaderBlocks({
+  const blocks = timeOffRequestHeaderBlocks({
     employee: "U12345",
     start_date: "2022-03-01",
     end_date: "2022-03-10",
diff --git a/functions/send_time_off_request_to_manager/mod_test.ts b/functions/send_time_off_request_to_manager/mod_test.ts
index 6d3dd49..ad0e618 100644
--- a/functions/send_time_off_request_to_manager/mod_test.ts
+++ b/functions/send_time_off_request_to_manager/mod_test.ts
@@ -1,31 +1,38 @@
-import * as mf from "https://deno.land/x/mock_fetch@0.3.0/mod.ts";
+import { stub } from "@std/testing/mock";
 import { SlackFunctionTester } from "deno-slack-sdk/mod.ts";
-import { assertEquals } from "https://deno.land/std@0.153.0/testing/asserts.ts";
+import { assertEquals } from "@std/assert";
 import handler from "./mod.ts";
 
-// Replaces globalThis.fetch with the mocked copy
-mf.install();
-
-mf.mock("POST@/api/chat.postMessage", async (req) => {
-  const body = await req.formData();
-  if (body.get("channel")?.toString() !== "U22222") {
-    return new Response(`{"ok": false, "error": "unexpected channel ID"}`, {
-      status: 200,
-    });
-  }
-  if (body.get("blocks") === undefined) {
-    return new Response(`{"ok": false, "error": "blocks are missing!"}`, {
-      status: 200,
-    });
-  }
-  return new Response(`{"ok": true, "message": {"ts": "111.222"}}`, {
-    status: 200,
-  });
-});
-
 const { createContext } = SlackFunctionTester("my-function");
 
 Deno.test("SendTimeOffRequestToManagerFunction runs successfully", async () => {
+  // Replaces globalThis.fetch with the mocked copy
+  using _fetchStub = stub(
+    globalThis,
+    "fetch",
+    async (url: string | URL | Request, options?: RequestInit) => {
+      const request = url instanceof Request ? url : new Request(url, options);
+
+      assertEquals(request.method, "POST");
+      assertEquals(request.url, "https://slack.com/api/chat.postMessage");
+
+      const body = await request.formData();
+      if (body.get("channel")?.toString() !== "U22222") {
+        return new Response(`{"ok": false, "error": "unexpected channel ID"}`, {
+          status: 200,
+        });
+      }
+      if (body.get("blocks") === undefined) {
+        return new Response(`{"ok": false, "error": "blocks are missing!"}`, {
+          status: 200,
+        });
+      }
+      return new Response(`{"ok": true, "message": {"ts": "111.222"}}`, {
+        status: 200,
+      });
+    },
+  );
+
   const inputs = {
     employee: "U11111",
     manager: "U22222",
diff --git a/import_map.json b/import_map.json
deleted file mode 100644
index 90f6d26..0000000
--- a/import_map.json
+++ /dev/null
@@ -1,6 +0,0 @@
-{
-  "imports": {
-    "deno-slack-sdk/": "https://deno.land/x/deno_slack_sdk@2.15.0/",
-    "deno-slack-api/": "https://deno.land/x/deno_slack_api@2.8.0/"
-  }
-}
diff --git a/triggers/trigger.ts b/triggers/trigger.ts
index 300174a..964b907 100644
--- a/triggers/trigger.ts
+++ b/triggers/trigger.ts
@@ -1,4 +1,4 @@
-import { Trigger } from "deno-slack-sdk/types.ts";
+import type { Trigger } from "deno-slack-sdk/types.ts";
 import { TriggerContextData, TriggerTypes } from "deno-slack-api/mod.ts";
 
 const trigger: Trigger = {