diff --git a/package.json b/package.json
index d638e334ed..fa872e9b25 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
   },
   "dependencies": {
     "@ember-data/rfc395-data": "^0.0.4",
-    "css-tree": "^2.3.1",
+    "css-tree": "^3.0.1",
     "ember-eslint-parser": "^0.5.4",
     "ember-rfc176-data": "^0.3.18",
     "eslint-utils": "^3.0.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 30f757c47c..065058aa19 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -12,8 +12,8 @@ importers:
         specifier: ^0.0.4
         version: 0.0.4
       css-tree:
-        specifier: ^2.3.1
-        version: 2.3.1
+        specifier: ^3.0.1
+        version: 3.0.1
       ember-eslint-parser:
         specifier: ^0.5.4
         version: 0.5.4(@babel/core@7.26.0)(@typescript-eslint/parser@8.11.0(eslint@8.57.1)(typescript@5.6.3))(eslint@8.57.1)
@@ -1203,8 +1203,8 @@ packages:
     resolution: {integrity: sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==}
     engines: {node: '>= 8'}
 
-  css-tree@2.3.1:
-    resolution: {integrity: sha512-6Fv1DV/TYw//QF5IzQdqsNDjx/wc8TrMBZsqjL9eW01tWb7R7k/mq+/VXfJCl7SoD5emsJop9cOByJZfs8hYIw==}
+  css-tree@3.0.1:
+    resolution: {integrity: sha512-8Fxxv+tGhORlshCdCwnNJytvlvq46sOLSYEx2ZIGurahWvMucSRnyjPA3AmrMq4VPRYbHVpWj5VkiVasrM2H4Q==}
     engines: {node: ^10 || ^12.20.0 || ^14.13.0 || >=15.0.0}
 
   cssstyle@4.1.0:
@@ -2302,8 +2302,8 @@ packages:
   mdast-util-to-string@2.0.0:
     resolution: {integrity: sha512-AW4DRS3QbBayY/jJmD8437V1Gombjf8RSOUCMFBuo5iHi58AGEgVCKQ+ezHkZZDpAQS75hcBMpLqjpJTjtUL7w==}
 
-  mdn-data@2.0.30:
-    resolution: {integrity: sha512-GaqWWShW4kv/G9IEucWScBx9G1/vsFZZJUO+tD26M8J8z3Kw5RDQjaoZe03YAClgeS/SWPOcb4nkFBTEi5DUEA==}
+  mdn-data@2.12.1:
+    resolution: {integrity: sha512-rsfnCbOHjqrhWxwt5/wtSLzpoKTzW7OXdT5lLOIH1OTYhWu9rRJveGq0sKvDZODABH7RX+uoR+DYcpFnq4Tf6Q==}
 
   mdurl@2.0.0:
     resolution: {integrity: sha512-Lf+9+2r+Tdp5wXDXC4PcIBjTDtq4UKjCPMQhKIuzpJNW0b96kVqSwW0bT7FhRSfmAiFYgP+SCRvdrDozfh0U5w==}
@@ -4622,9 +4622,9 @@ snapshots:
       shebang-command: 2.0.0
       which: 2.0.2
 
-  css-tree@2.3.1:
+  css-tree@3.0.1:
     dependencies:
-      mdn-data: 2.0.30
+      mdn-data: 2.12.1
       source-map-js: 1.2.1
 
   cssstyle@4.1.0:
@@ -5912,7 +5912,7 @@ snapshots:
 
   mdast-util-to-string@2.0.0: {}
 
-  mdn-data@2.0.30: {}
+  mdn-data@2.12.1: {}
 
   mdurl@2.0.0: {}