diff --git a/packages/compat/src/get-real-addon.ts b/packages/compat/src/get-real-addon.ts
index 55080b35d..50dcd7e9c 100644
--- a/packages/compat/src/get-real-addon.ts
+++ b/packages/compat/src/get-real-addon.ts
@@ -7,7 +7,7 @@
 let TARGET_INSTANCE_SYMBOL: any;
 
 try {
-  // eslint-disable-next-line @typescript-eslint/no-require-imports
+  // eslint-disable-next-line @typescript-eslint/no-require-imports, import/no-extraneous-dependencies
   const targetInstanceModule = require('ember-cli/lib/models/per-bundle-addon-cache/target-instance');
 
   if (targetInstanceModule) {
diff --git a/packages/router/package.json b/packages/router/package.json
index 48b993a47..99dc0a6fa 100644
--- a/packages/router/package.json
+++ b/packages/router/package.json
@@ -45,7 +45,7 @@
     "broccoli-asset-rev": "^3.0.0",
     "cross-env": "^7.0.3",
     "ember-auto-import": "^1.11.2",
-    "ember-cli": "~3.27.0",
+    "ember-cli": "~3.28.0",
     "ember-cli-dependency-checker": "^3.1.0",
     "ember-cli-htmlbars": "^4.3.1",
     "ember-cli-htmlbars-inline-precompile": "^2.1.0",
diff --git a/packages/util/package.json b/packages/util/package.json
index 2e5fb7826..fe506dada 100644
--- a/packages/util/package.json
+++ b/packages/util/package.json
@@ -48,7 +48,7 @@
     "broccoli-asset-rev": "^3.0.0",
     "cross-env": "^7.0.3",
     "ember-auto-import": "^2.2.0",
-    "ember-cli": "~3.27.0",
+    "ember-cli": "~3.28.0",
     "ember-cli-dependency-checker": "^3.2.0",
     "ember-cli-htmlbars": "^5.3.2",
     "ember-cli-inject-live-reload": "^2.0.2",
@@ -61,7 +61,7 @@
     "ember-page-title": "^6.2.1",
     "ember-qunit": "^5.1.2",
     "ember-resolver": "^8.0.2",
-    "ember-source": "~3.26",
+    "ember-source": "https://s3.amazonaws.com/builds.emberjs.com/release/shas/f243a4f0947a0be1d324b5250c4e2327c6bd7a5f.tgz",
     "ember-source-channel-url": "^3.0.0",
     "ember-template-lint": "^2.18.1",
     "ember-try": "^1.4.0",
diff --git a/test-packages/fastboot-addon/package.json b/test-packages/fastboot-addon/package.json
index 2fe59cc6d..29fce734d 100644
--- a/test-packages/fastboot-addon/package.json
+++ b/test-packages/fastboot-addon/package.json
@@ -33,7 +33,7 @@
     "babel-eslint": "^10.1.0",
     "broccoli-asset-rev": "^3.0.0",
     "ember-auto-import": "^2.2.0",
-    "ember-cli": "~3.27.0",
+    "ember-cli": "~3.28.0",
     "ember-cli-dependency-checker": "^3.2.0",
     "ember-cli-inject-live-reload": "^2.0.2",
     "ember-cli-sri": "^2.1.1",
diff --git a/test-packages/sample-transforms/package.json b/test-packages/sample-transforms/package.json
index 3ed396f51..2e108698f 100644
--- a/test-packages/sample-transforms/package.json
+++ b/test-packages/sample-transforms/package.json
@@ -28,7 +28,7 @@
     "@embroider/test-support": "0.36.0",
     "broccoli-asset-rev": "^3.0.0",
     "ember-auto-import": "^2.2.0",
-    "ember-cli": "~3.27.0",
+    "ember-cli": "~3.28.0",
     "ember-cli-dependency-checker": "^3.1.0",
     "ember-cli-eslint": "^5.1.0",
     "ember-cli-htmlbars": "^4.3.1",
diff --git a/test-packages/support/package.json b/test-packages/support/package.json
index ba991a80d..06851e2fc 100644
--- a/test-packages/support/package.json
+++ b/test-packages/support/package.json
@@ -14,7 +14,7 @@
     "broccoli": "^3.4.2",
     "console-ui": "^3.0.0",
     "ember-auto-import": "^2.2.0",
-    "ember-cli": "~3.27.0",
+    "ember-cli": "~3.28.0",
     "ember-cli-babel": "^7.20.5",
     "ember-cli-htmlbars": "^4.2.0",
     "ember-resolver": "^7.0.0",
diff --git a/tests/addon-template/package.json b/tests/addon-template/package.json
index bf6cc7050..25980315b 100644
--- a/tests/addon-template/package.json
+++ b/tests/addon-template/package.json
@@ -38,7 +38,7 @@
     "babel-eslint": "^10.1.0",
     "broccoli-asset-rev": "^3.0.0",
     "ember-auto-import": "^2.2.0",
-    "ember-cli": "~3.27.0",
+    "ember-cli": "~3.28.0",
     "ember-cli-dependency-checker": "^3.2.0",
     "ember-cli-inject-live-reload": "^2.0.2",
     "ember-cli-sri": "^2.1.1",
diff --git a/tests/app-template/package.json b/tests/app-template/package.json
index e57c16b28..f01cc52d8 100644
--- a/tests/app-template/package.json
+++ b/tests/app-template/package.json
@@ -35,7 +35,7 @@
     "babel-eslint": "^10.1.0",
     "broccoli-asset-rev": "^3.0.0",
     "ember-auto-import": "^2.2.0",
-    "ember-cli": "~3.27.0",
+    "ember-cli": "~3.28.0",
     "ember-cli-app-version": "^5.0.0",
     "ember-cli-babel": "^7.26.3",
     "ember-cli-dependency-checker": "^3.2.0",
diff --git a/yarn.lock b/yarn.lock
index 9588c6b76..8b1a51869 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2060,6 +2060,13 @@
   dependencies:
     babel-plugin-debug-macros "^0.3.4"
 
+"@glimmer/vm-babel-plugins@0.80.0":
+  version "0.80.0"
+  resolved "https://registry.yarnpkg.com/@glimmer/vm-babel-plugins/-/vm-babel-plugins-0.80.0.tgz#e9a6b496501eed367b94c928dc48a954830af3b5"
+  integrity sha512-ZW6+L+FzjDZngGj87zn3MRRA/MrchC7Con33mCcI36v8u48maheB351uhQe+fBVU300IfyzNMvAdwdVKS5VIFw==
+  dependencies:
+    babel-plugin-debug-macros "^0.3.4"
+
 "@glimmer/vm@^0.42.2":
   version "0.42.2"
   resolved "https://registry.yarnpkg.com/@glimmer/vm/-/vm-0.42.2.tgz#492a4f05eac587c3a37371b3c62593f20bef553d"
@@ -8147,10 +8154,10 @@ ember-cli-version-checker@^5.1.1, ember-cli-version-checker@^5.1.2:
     semver "^7.3.4"
     silent-error "^1.1.1"
 
-ember-cli@~3.27.0:
-  version "3.27.0"
-  resolved "https://registry.yarnpkg.com/ember-cli/-/ember-cli-3.27.0.tgz#8ccf9db51d7b462f86210b853d086a4543605c34"
-  integrity sha512-vFLPFkplXn5v005fattHdOcs5AbSp7RG4w1wpHDWHzOSYpl2Dr+5zzZtqLS7V5IVaLf3XK4l24XwhSW9HpMfsQ==
+ember-cli@~3.28.0:
+  version "3.28.0"
+  resolved "https://registry.yarnpkg.com/ember-cli/-/ember-cli-3.28.0.tgz#0a0374c9a1d08386ddf56e8098a38b71dd4453bc"
+  integrity sha512-CrMs5edFQ2ingO2xfT33T4nUEl8SlvBQ7q+XO9L/GFTvFU07slHxYSvGur0cwgQfOiLnkSTnIaVF1oqBnEmfPQ==
   dependencies:
     "@babel/core" "^7.13.8"
     "@babel/plugin-transform-modules-amd" "^7.12.1"
@@ -8166,7 +8173,7 @@ ember-cli@~3.27.0:
     broccoli-config-loader "^1.0.1"
     broccoli-config-replace "^1.1.2"
     broccoli-debug "^0.6.5"
-    broccoli-funnel "^2.0.2"
+    broccoli-funnel "^3.0.5"
     broccoli-funnel-reducer "^1.0.0"
     broccoli-merge-trees "^3.0.2"
     broccoli-middleware "^2.1.1"
@@ -8232,7 +8239,7 @@ ember-cli@~3.27.0:
     sane "^4.1.0"
     semver "^7.3.4"
     silent-error "^1.1.1"
-    sort-package-json "^1.48.0"
+    sort-package-json "^1.49.0"
     symlink-or-copy "^1.3.1"
     temp "0.9.4"
     testem "^3.2.0"
@@ -8241,7 +8248,7 @@ ember-cli@~3.27.0:
     uuid "^8.3.2"
     walk-sync "^2.2.0"
     watch-detector "^1.0.0"
-    workerpool "^6.0.3"
+    workerpool "^6.1.4"
     yam "^1.0.0"
 
 ember-compatibility-helpers@^1.1.1, ember-compatibility-helpers@^1.1.2, ember-compatibility-helpers@^1.2.0, ember-compatibility-helpers@^1.2.1, ember-compatibility-helpers@^1.2.2, ember-compatibility-helpers@^1.2.4:
@@ -8877,6 +8884,37 @@ ember-source-channel-url@^3.0.0:
     semver "^7.3.4"
     silent-error "^1.1.1"
 
+"ember-source@https://s3.amazonaws.com/builds.emberjs.com/release/shas/f243a4f0947a0be1d324b5250c4e2327c6bd7a5f.tgz":
+  version "3.28.0-release"
+  resolved "https://s3.amazonaws.com/builds.emberjs.com/release/shas/f243a4f0947a0be1d324b5250c4e2327c6bd7a5f.tgz#83db5d57cde6579de7de1a9b8705cc0000c3a8fb"
+  dependencies:
+    "@babel/helper-module-imports" "^7.8.3"
+    "@babel/plugin-transform-block-scoping" "^7.8.3"
+    "@babel/plugin-transform-object-assign" "^7.8.3"
+    "@ember/edition-utils" "^1.2.0"
+    "@glimmer/vm-babel-plugins" "0.80.0"
+    babel-plugin-debug-macros "^0.3.3"
+    babel-plugin-filter-imports "^4.0.0"
+    broccoli-concat "^4.2.4"
+    broccoli-debug "^0.6.4"
+    broccoli-file-creator "^2.1.1"
+    broccoli-funnel "^2.0.2"
+    broccoli-merge-trees "^4.2.0"
+    chalk "^4.0.0"
+    ember-cli-babel "^7.23.0"
+    ember-cli-get-component-path-option "^1.0.0"
+    ember-cli-is-package-missing "^1.0.0"
+    ember-cli-normalize-entity-name "^1.0.0"
+    ember-cli-path-utils "^1.0.0"
+    ember-cli-string-utils "^1.1.0"
+    ember-cli-version-checker "^5.1.1"
+    ember-router-generator "^2.0.0"
+    inflection "^1.12.0"
+    jquery "^3.5.1"
+    resolve "^1.17.0"
+    semver "^7.3.4"
+    silent-error "^1.1.1"
+
 ember-source@~3.26:
   version "3.26.1"
   resolved "https://registry.yarnpkg.com/ember-source/-/ember-source-3.26.1.tgz#8c9e8a314fb0da447b944d64f9d92a80a628d7b5"
@@ -16276,7 +16314,7 @@ sort-object-keys@^1.1.3:
   resolved "https://registry.yarnpkg.com/sort-object-keys/-/sort-object-keys-1.1.3.tgz#bff833fe85cab147b34742e45863453c1e190b45"
   integrity sha512-855pvK+VkU7PaKYPc+Jjnmt4EzejQHyhhF33q31qG8x7maDzkeFhAAThdCYay11CISO+qAMwjOBP+fPZe0IPyg==
 
-sort-package-json@^1.39.1, sort-package-json@^1.44.0, sort-package-json@^1.48.0:
+sort-package-json@^1.39.1, sort-package-json@^1.44.0, sort-package-json@^1.48.0, sort-package-json@^1.49.0:
   version "1.50.0"
   resolved "https://registry.yarnpkg.com/sort-package-json/-/sort-package-json-1.50.0.tgz#19fc109fe23bd157bd03c8e572fa3251a52467d8"
   integrity sha512-qZpqhMU9XTntebgAgc4hv/D6Fzhh7kFnwvV6a7+q8y8J5JoaDqPYQnvXPf7BBqG95tdE8X6JVNo7/jDzcbdfUg==