diff --git a/packages/ember-concurrency/src/-private/task-public-api.js b/packages/ember-concurrency/src/-private/task-public-api.js
index 8f0b3d72e..2afc5e9e8 100644
--- a/packages/ember-concurrency/src/-private/task-public-api.js
+++ b/packages/ember-concurrency/src/-private/task-public-api.js
@@ -11,7 +11,8 @@ import {
 } from './task-decorators';
 import { assert } from '@ember/debug';
 
-/** @typedef {import('./task-group').TaskGroup} TaskGroup */
+// eslint-disable-next-line no-unused-vars
+import { TaskGroup } from './task-group';
 
 /**
  * TODO: update docs to reflect both old and new ES6 styles
diff --git a/packages/test-app/package.json b/packages/test-app/package.json
index 10bee3e88..1fb995e90 100644
--- a/packages/test-app/package.json
+++ b/packages/test-app/package.json
@@ -81,7 +81,7 @@
     "eslint-plugin-n": "^15.6.1",
     "eslint-plugin-qunit": "^7.3.4",
     "expect-type": "^0.15.0",
-    "jsdoc": "^3.6.6",
+    "jsdoc": "^4.0.0",
     "loader.js": "^4.7.0",
     "prember": "~2.0.0",
     "prettier": "^3.1.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 367204311..25130aef2 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -265,8 +265,8 @@ importers:
         specifier: ^0.15.0
         version: 0.15.0
       jsdoc:
-        specifier: ^3.6.6
-        version: 3.6.11
+        specifier: ^4.0.0
+        version: 4.0.2
       loader.js:
         specifier: ^4.7.0
         version: 4.7.0
@@ -1993,6 +1993,13 @@ packages:
       '@jridgewell/resolve-uri': 3.1.1
       '@jridgewell/sourcemap-codec': 1.4.15
 
+  /@jsdoc/salty@0.2.7:
+    resolution: {integrity: sha512-mh8LbS9d4Jq84KLw8pzho7XC2q2/IJGiJss3xwRoLD1A+EE16SjN4PfaG4jRCzKegTFLlN0Zd8SdUPE6XdoPFg==}
+    engines: {node: '>=v12.0.0'}
+    dependencies:
+      lodash: 4.17.21
+    dev: true
+
   /@lint-todo/utils@13.1.1:
     resolution: {integrity: sha512-F5z53uvRIF4dYfFfJP3a2Cqg+4P1dgJchJsFnsZE0eZp0LK8X7g2J0CsJHRgns+skpXOlM7n5vFGwkWCWj8qJg==}
     engines: {node: 12.* || >= 14}
@@ -8216,12 +8223,13 @@ packages:
       xmlcreate: 2.0.4
     dev: true
 
-  /jsdoc@3.6.11:
-    resolution: {integrity: sha512-8UCU0TYeIYD9KeLzEcAu2q8N/mx9O3phAGl32nmHlE0LpaJL71mMkP4d+QE5zWfNt50qheHtOZ0qoxVrsX5TUg==}
+  /jsdoc@4.0.2:
+    resolution: {integrity: sha512-e8cIg2z62InH7azBBi3EsSEqrKx+nUtAS5bBcYTSpZFA+vhNPyhv8PTFZ0WsjOPDj04/dOLlm08EDcQJDqaGQg==}
     engines: {node: '>=12.0.0'}
     hasBin: true
     dependencies:
       '@babel/parser': 7.23.9
+      '@jsdoc/salty': 0.2.7
       '@types/markdown-it': 12.2.3
       bluebird: 3.7.2
       catharsis: 0.9.0
@@ -8234,7 +8242,6 @@ packages:
       mkdirp: 1.0.4
       requizzle: 0.2.4
       strip-json-comments: 3.1.1
-      taffydb: 2.6.2
       underscore: 1.13.6
     dev: true
 
@@ -11097,10 +11104,6 @@ packages:
       strip-ansi: 6.0.1
     dev: true
 
-  /taffydb@2.6.2:
-    resolution: {integrity: sha512-y3JaeRSplks6NYQuCOj3ZFMO3j60rTwbuKCvZxsAraGYH2epusatvZ0baZYA01WsGqJBq/Dl6vOrMUJqyMj8kA==}
-    dev: true
-
   /tap-parser@7.0.0:
     resolution: {integrity: sha512-05G8/LrzqOOFvZhhAk32wsGiPZ1lfUrl+iV7+OkKgfofZxiceZWMHkKmow71YsyVQ8IvGBP2EjcIjE5gL4l5lA==}
     hasBin: true