diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 24ba5adc..ed275eaf 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -23,7 +23,7 @@ importers:
         version: 2.27.9
       '@glint/core':
         specifier: ^1.3.0
-        version: 1.4.0(typescript@5.6.3)
+        version: 1.4.0(typescript@5.5.4)
 
   ember-velcro:
     dependencies:
@@ -207,8 +207,8 @@ importers:
         specifier: ^2.2.58
         version: 2.2.60(@babel/eslint-parser@7.25.8)(typescript@5.5.4)
       '@tsconfig/ember':
-        specifier: ^1.1.0
-        version: 1.1.0
+        specifier: ^3.0.0
+        version: 3.0.8
       '@types/ember':
         specifier: ^4.0.4
         version: 4.0.11(@babel/core@7.25.8)
@@ -3875,26 +3875,6 @@ packages:
       - supports-color
     dev: true
 
-  /@glint/core@1.4.0(typescript@5.6.3):
-    resolution: {integrity: sha512-nq27a/1R6kc3lsuciz8z9IZO1NQCbNkEBxf5KJI7AUrnps6RzQzmq3pmwO24zQYmFcH4sqpod8fleNIpg8YEqg==}
-    hasBin: true
-    peerDependencies:
-      typescript: '>=4.8.0'
-    dependencies:
-      '@glimmer/syntax': 0.84.3
-      escape-string-regexp: 4.0.0
-      semver: 7.6.0
-      silent-error: 1.1.1
-      typescript: 5.6.3
-      uuid: 8.3.2
-      vscode-languageserver: 8.1.0
-      vscode-languageserver-textdocument: 1.0.11
-      vscode-uri: 3.0.8
-      yargs: 17.7.2
-    transitivePeerDependencies:
-      - supports-color
-    dev: true
-
   /@glint/environment-ember-loose@1.4.0(@glimmer/component@1.1.2)(@glint/template@1.4.0)(@types/ember__array@4.0.10)(@types/ember__component@4.0.22)(@types/ember__controller@4.0.12)(@types/ember__object@4.0.12)(@types/ember__routing@4.0.22)(ember-cli-htmlbars@6.3.0)(ember-modifier@4.1.0):
     resolution: {integrity: sha512-vFR3qgPTisGzS36e04195wTUrtUc6GuVwm6hsC/XXx6PeRw/6rtMxhK08Aw/VtDc00UqQzM9sIEghPVKHwqVVQ==}
     peerDependencies:
@@ -4604,8 +4584,8 @@ packages:
     engines: {node: '>= 6'}
     dev: true
 
-  /@tsconfig/ember@1.1.0:
-    resolution: {integrity: sha512-VzIrPO7ZpnIEmU+dJe3ubEPhxUIyavwIh2vxg8rXrwSnB99hdVcq0ZFPQ4KRP0LrSNzaPI1QA2sATIPwnBYPQg==}
+  /@tsconfig/ember@3.0.8:
+    resolution: {integrity: sha512-OVnIsZIt/8q0VEtcdz3rRryNrm6gdJTxXlxefkGIrkZnME0wqslmwHlUEZ7mvh377df9FqBhNKrYNarhCW8zJA==}
     dev: true
 
   /@types/acorn@4.0.6:
@@ -15568,12 +15548,6 @@ packages:
     hasBin: true
     dev: true
 
-  /typescript@5.6.3:
-    resolution: {integrity: sha512-hjcS1mhfuyi4WW8IWtjP7brDrG2cuDZukyrYrSauoXGNgx0S7zceP07adYkJycEr56BOUTNPzbInooiN3fn1qw==}
-    engines: {node: '>=14.17'}
-    hasBin: true
-    dev: true
-
   /ua-parser-js@1.0.38:
     resolution: {integrity: sha512-Aq5ppTOfvrCMgAPneW1HfWj66Xi7XL+/mIy996R1/CLS/rcyJQm6QZdsKrUeivDFQ+Oc9Wyuwor8Ze8peEoUoQ==}
     dev: true
diff --git a/test-app/package.json b/test-app/package.json
index 59d41452..e63617b5 100644
--- a/test-app/package.json
+++ b/test-app/package.json
@@ -55,7 +55,7 @@
     "@glint/environment-ember-template-imports": "^1.0.2",
     "@glint/template": "^1.0.2",
     "@nullvoxpopuli/eslint-configs": "^2.2.58",
-    "@tsconfig/ember": "^1.1.0",
+    "@tsconfig/ember": "^3.0.0",
     "@types/ember": "^4.0.4",
     "@types/ember__application": "^4.0.6",
     "@types/ember__array": "^4.0.4",