diff --git a/files/__addonLocation__/package.json b/files/__addonLocation__/package.json
index d65a51f..91464a0 100644
--- a/files/__addonLocation__/package.json
+++ b/files/__addonLocation__/package.json
@@ -42,28 +42,7 @@
     "@glint/environment-ember-loose": "^1.4.0",
     "@glint/environment-ember-template-imports": "^1.4.0",
     "@glint/template": "^1.4.0",
-    "@tsconfig/ember": "^3.0.6",
-    "@types/ember": "^4.0.11",
-    "@types/ember__application": "^4.0.11",
-    "@types/ember__array": "^4.0.10",
-    "@types/ember__component": "^4.0.22",
-    "@types/ember__controller": "^4.0.12",
-    "@types/ember__debug": "^4.0.8",
-    "@types/ember__destroyable": "^4.0.5",
-    "@types/ember__engine": "^4.0.11",
-    "@types/ember__error": "^4.0.6",
-    "@types/ember__helper": "^4.0.8",
-    "@types/ember__modifier": "^4.0.9",
-    "@types/ember__object": "^4.0.12",
-    "@types/ember__owner": "^4.0.9",
-    "@types/ember__polyfills": "^4.0.6",
-    "@types/ember__routing": "^4.0.19",
-    "@types/ember__runloop": "^4.0.10",
-    "@types/ember__service": "^4.0.9",
-    "@types/ember__string": "^3.16.3",
-    "@types/ember__template": "^4.0.7",
-    "@types/ember__test": "^4.0.6",
-    "@types/ember__utils": "^4.0.7",
+    "@tsconfig/ember": "^3.0.8",
     "@typescript-eslint/eslint-plugin": "^8.13.0",
     "@typescript-eslint/parser": "^8.13.0",<% } %>
     "@rollup/plugin-babel": "^6.0.4",
diff --git a/files/__addonLocation__/tsconfig.json b/files/__addonLocation__/tsconfig.json
index a80eff6..28dd17e 100644
--- a/files/__addonLocation__/tsconfig.json
+++ b/files/__addonLocation__/tsconfig.json
@@ -48,6 +48,10 @@
       We want our tooling to know how to resolve our custom files so the appropriate plugins
       can do the proper transformations on those files.
     */
-    "allowImportingTsExtensions": true
+    "allowImportingTsExtensions": true,
+
+    "types": [
+      "ember-source/types"
+    ]
   }
 }