diff --git a/package.json b/package.json
index d2f2f304..236b4184 100644
--- a/package.json
+++ b/package.json
@@ -112,7 +112,7 @@
     "ember-page-title": "^6.2.1",
     "ember-qunit": "^5.1.4",
     "ember-resolver": "^8.0.2",
-    "ember-source": "~3.26.1",
+    "ember-source": "~3.28.1",
     "ember-source-channel-url": "^3.0.0",
     "ember-template-lint": "^2.21.0",
     "ember-try": "^1.4.0",
diff --git a/yarn.lock b/yarn.lock
index 466e6137..dbfca862 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1313,10 +1313,10 @@
   resolved "https://registry.npmjs.org/@glimmer/validator/-/validator-0.44.0.tgz#03d127097dc9cb23052cdb7fcae59d0a9dca53e1"
   integrity sha512-i01plR0EgFVz69GDrEuFgq1NheIjZcyTy3c7q+w7d096ddPVeVcRzU3LKaqCfovvLJ+6lJx40j45ecycASUUyw==
 
-"@glimmer/vm-babel-plugins@0.77.5":
-  version "0.77.5"
-  resolved "https://registry.yarnpkg.com/@glimmer/vm-babel-plugins/-/vm-babel-plugins-0.77.5.tgz#daffb6507aa6b08ec36f69d652897d339fdd0007"
-  integrity sha512-jTBM7fJMrIEy4/bCeI8e7ypR+AuWYzLA+KORCGbnTJtL/NYg4G8qwhQAZBtg1d3KmoqyqaCsyqE6f4/tzJO4eQ==
+"@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"
 
@@ -6234,20 +6234,21 @@ ember-source-channel-url@^3.0.0:
   dependencies:
     node-fetch "^2.6.0"
 
-ember-source@~3.26.1:
-  version "3.26.1"
-  resolved "https://registry.yarnpkg.com/ember-source/-/ember-source-3.26.1.tgz#8c9e8a314fb0da447b944d64f9d92a80a628d7b5"
-  integrity sha512-5/NATBo5h9m1N52ITVksmjtGlYhGHLl4lDErAWv5/DC9zYe9ZR93NtymR6PEqrRilXc2x0KWd3NlOsWUoJRUOw==
+ember-source@~3.28.1:
+  version "3.28.1"
+  resolved "https://registry.yarnpkg.com/ember-source/-/ember-source-3.28.1.tgz#dbd00dde4e5660231c72574589e7705ed8c76b1d"
+  integrity sha512-dPedE1KBNiFllxzS8uiTWCf5Kofd6hrbJCt162UrTfEMZy6Pt4dZrX2kz0Dq/Fi57FrFAYkMM2cuhYCz2dbENw==
   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" "0.77.5"
+    "@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"