diff --git a/ember-scoped-css-compat/package.json b/ember-scoped-css-compat/package.json
index c80e1a8f..5726b33a 100644
--- a/ember-scoped-css-compat/package.json
+++ b/ember-scoped-css-compat/package.json
@@ -35,29 +35,29 @@
     "@babel/eslint-parser": "^7.26.8",
     "@babel/plugin-proposal-decorators": "^7.25.9",
     "@ember/optional-features": "^2.2.0",
-    "@ember/string": "^3.0.1",
-    "@ember/test-helpers": "^3.2.0",
+    "@ember/string": "^4.0.0",
+    "@ember/test-helpers": "^5.0.0",
     "@embroider/test-setup": "^4.0.0",
     "@glimmer/component": "^1.1.2",
-    "@nullvoxpopuli/eslint-configs": "^4.3.0",
+    "@nullvoxpopuli/eslint-configs": "^5.0.0",
     "broccoli-asset-rev": "^3.0.0",
     "concurrently": "^9.1.2",
     "ember-auto-import": "^2.10.0",
-    "ember-cli": "~5.12.0",
+    "ember-cli": "~6.5.0",
     "ember-cli-dependency-checker": "^3.3.3",
     "ember-cli-inject-live-reload": "^2.1.0",
     "ember-cli-sri": "^2.1.1",
     "ember-cli-terser": "^4.0.2",
-    "ember-load-initializers": "^2.1.2",
-    "ember-page-title": "^8.2.4",
-    "ember-qunit": "^8.0.2",
-    "ember-resolver": "^12.0.0",
+    "ember-load-initializers": "^3.0.0",
+    "ember-page-title": "^9.0.0",
+    "ember-qunit": "^9.0.0",
+    "ember-resolver": "^13.0.0",
     "ember-scoped-css": "workspace:*",
-    "ember-source": "~5.12.0",
+    "ember-source": "~6.5.0",
     "ember-source-channel-url": "^3.0.0",
-    "ember-template-lint": "^6.1.0",
-    "ember-try": "^3.0.0",
-    "eslint": "^8.50.0",
+    "ember-template-lint": "^7.0.0",
+    "ember-try": "^4.0.0",
+    "eslint": "^9.0.0",
     "eslint-plugin-ember": "^12.5.0",
     "eslint-plugin-n": "^17.15.1",
     "eslint-plugin-qunit": "^8.1.2",
diff --git a/ember-scoped-css/package.json b/ember-scoped-css/package.json
index a9b17e1a..ca87602a 100644
--- a/ember-scoped-css/package.json
+++ b/ember-scoped-css/package.json
@@ -99,17 +99,17 @@
   },
   "devDependencies": {
     "@babel/eslint-parser": "^7.26.8",
-    "@nullvoxpopuli/eslint-configs": "^4.3.0",
+    "@nullvoxpopuli/eslint-configs": "^5.0.0",
     "@tsconfig/ember": "^3.0.9",
     "@tsconfig/strictest": "^2.0.5",
     "@types/blueimp-md5": "^2.18.2",
     "@typescript-eslint/eslint-plugin": "^8.24.1",
     "@typescript-eslint/parser": "^8.24.1",
     "concurrently": "^9.1.2",
-    "ember-template-lint": "^6.1.0",
+    "ember-template-lint": "^7.0.0",
     "esbuild": "^0.25.0",
     "esbuild-plugin-vitest-cleaner": "^0.5.1",
-    "eslint": "^8.50.0",
+    "eslint": "^9.0.0",
     "prettier": "^3.5.1",
     "typescript": "^5.2.2",
     "vitest": "^3.0.6",