diff --git a/package.json b/package.json
index 3121e530c0c..ae612dba5a9 100644
--- a/package.json
+++ b/package.json
@@ -130,7 +130,7 @@
     "ember-truth-helpers": "^3.0.0",
     "ember-uuid": "^2.1.0",
     "eslint": "^7.12.1",
-    "eslint-plugin-ember": "^9.3.0",
+    "eslint-plugin-ember": "^9.4.0",
     "eslint-plugin-ember-suave": "^2.0.1",
     "eslint-plugin-node": "^11.1.0",
     "fastboot-app-server": "^3.0.0",
diff --git a/yarn.lock b/yarn.lock
index 629453144a0..08f0e9f599d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5723,6 +5723,14 @@ css-select@~1.0.0:
     domutils "1.4"
     nth-check "~1.0.0"
 
+css-tree@^1.0.0-alpha.39:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/css-tree/-/css-tree-1.0.0.tgz#21993fa270d742642a90409a2c0cb3ac0298adf6"
+  integrity sha512-CdVYz/Yuqw0VdKhXPBIgi8DO3NicJVYZNWeX9XcIuSp9ZoFT5IcleVRW07O5rMjdcx1mb+MEJPknTTEW7DdsYw==
+  dependencies:
+    mdn-data "2.0.12"
+    source-map "^0.6.1"
+
 css-what@1.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/css-what/-/css-what-1.0.0.tgz#d7cc2df45180666f99d2b14462639469e00f736c"
@@ -7629,12 +7637,7 @@ ember-resolver@^8.0.2:
     ember-cli-version-checker "^5.1.1"
     resolve "^1.17.0"
 
-ember-rfc176-data@^0.3.1, ember-rfc176-data@^0.3.11, ember-rfc176-data@^0.3.13, ember-rfc176-data@^0.3.15:
-  version "0.3.15"
-  resolved "https://registry.yarnpkg.com/ember-rfc176-data/-/ember-rfc176-data-0.3.15.tgz#af3f1da5a0339b6feda380edc2f7190e0f416c2d"
-  integrity sha512-GPKa7zRDBblRy0orxTXt5yrpp/Pf5CkuRFSIR8qMFDww0CqCKjCRwdZnWYzCM4kAEfZnXRIDDefe1tBaFw7v7w==
-
-ember-rfc176-data@^0.3.16:
+ember-rfc176-data@^0.3.1, ember-rfc176-data@^0.3.11, ember-rfc176-data@^0.3.13, ember-rfc176-data@^0.3.15, ember-rfc176-data@^0.3.16:
   version "0.3.16"
   resolved "https://registry.yarnpkg.com/ember-rfc176-data/-/ember-rfc176-data-0.3.16.tgz#2ace0ac9cf9016d493a74a1d931643a308679803"
   integrity sha512-IYAzffS90r2ybAcx8c2qprYfkxa70G+/UPkxMN1hw55DU5S2aLOX6v3umKDZItoRhrvZMCnzwsdfKSrKdC9Wbg==
@@ -8166,12 +8169,13 @@ eslint-plugin-ember@^6.4.1:
     ember-rfc176-data "^0.3.11"
     snake-case "^2.1.0"
 
-eslint-plugin-ember@^9.3.0:
-  version "9.3.0"
-  resolved "https://registry.yarnpkg.com/eslint-plugin-ember/-/eslint-plugin-ember-9.3.0.tgz#77ec28a0c586ea55bbd30d140c784afcdf59e97b"
-  integrity sha512-qrzptSwC58HD8211vF8rGu+TRT8XzIsZVm6j4PleuSZqJ6k3VG8FKofQkb4ZBVU9jOJ0lnZCbYqBfjs4Iy/HHw==
+eslint-plugin-ember@^9.4.0:
+  version "9.4.0"
+  resolved "https://registry.yarnpkg.com/eslint-plugin-ember/-/eslint-plugin-ember-9.4.0.tgz#00780f4e6ba7da36fba1b50c8debcd8a775d1702"
+  integrity sha512-f5KtCFwFz5s2evd2C3idx/Pu/1D1wzh0kdsQZqPNuXmTaYmA9Y2fbXcFnaHB4Svwe3NE1HApkp3sbpBOdlznWA==
   dependencies:
     "@ember-data/rfc395-data" "^0.0.4"
+    css-tree "^1.0.0-alpha.39"
     ember-rfc176-data "^0.3.15"
     lodash.kebabcase "^4.1.1"
     snake-case "^3.0.3"
@@ -11818,6 +11822,11 @@ md5.js@^1.3.4:
     hash-base "^3.0.0"
     inherits "^2.0.1"
 
+mdn-data@2.0.12:
+  version "2.0.12"
+  resolved "https://registry.yarnpkg.com/mdn-data/-/mdn-data-2.0.12.tgz#bbb658d08b38f574bbb88f7b83703defdcc46844"
+  integrity sha512-ULbAlgzVb8IqZ0Hsxm6hHSlQl3Jckst2YEQS7fODu9ilNWy2LvcoSY7TRFIktABP2mdppBioc66va90T+NUs8Q==
+
 mdurl@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/mdurl/-/mdurl-1.0.1.tgz#fe85b2ec75a59037f2adfec100fd6c601761152e"