diff --git a/app/assets/javascripts/discourse-widget-hbs/package.json b/app/assets/javascripts/discourse-widget-hbs/package.json
index 7fedb2a4e78..4eefba15d3f 100644
--- a/app/assets/javascripts/discourse-widget-hbs/package.json
+++ b/app/assets/javascripts/discourse-widget-hbs/package.json
@@ -24,7 +24,7 @@
     "@ember/optional-features": "^2.1.0",
     "@embroider/test-setup": "^3.0.3",
     "@glimmer/component": "^1.1.2",
-    "@glimmer/syntax": "^0.88.1",
+    "@glimmer/syntax": "^0.89.0",
     "broccoli-asset-rev": "^3.0.0",
     "ember-cli": "~5.7.0",
     "ember-cli-inject-live-reload": "^2.1.0",
diff --git a/app/assets/javascripts/discourse/package.json b/app/assets/javascripts/discourse/package.json
index 383dd1d118f..939b8bedb51 100644
--- a/app/assets/javascripts/discourse/package.json
+++ b/app/assets/javascripts/discourse/package.json
@@ -16,7 +16,7 @@
     "postinstall": "../run-patch-package"
   },
   "dependencies": {
-    "@glimmer/syntax": "^0.88.1",
+    "@glimmer/syntax": "^0.89.0",
     "@highlightjs/cdn-assets": "^11.9.0",
     "discourse-hbr": "1.0.0",
     "discourse-widget-hbs": "1.0.0",
diff --git a/yarn.lock b/yarn.lock
index 9fe61b4f94e..021785b88cb 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1672,6 +1672,13 @@
   dependencies:
     "@simple-dom/interface" "^1.4.0"
 
+"@glimmer/interfaces@^0.89.0":
+  version "0.89.0"
+  resolved "https://registry.yarnpkg.com/@glimmer/interfaces/-/interfaces-0.89.0.tgz#990caa18fe253586e8465bc5f0408274feefef88"
+  integrity sha512-D3Y4QaYlldvukP8Xrue7CNNSYShMvIL6/8lIohLWYZ14eN17+WfhxA/yF9+jRGCUCoyobqhMvft+LlDhqH+NBw==
+  dependencies:
+    "@simple-dom/interface" "^1.4.0"
+
 "@glimmer/low-level@0.78.2":
   version "0.78.2"
   resolved "https://registry.yarnpkg.com/@glimmer/low-level/-/low-level-0.78.2.tgz#bca5f666760ce98345e87c5b3e37096e772cb2de"
@@ -1784,6 +1791,17 @@
     "@handlebars/parser" "~2.0.0"
     simple-html-tokenizer "^0.5.11"
 
+"@glimmer/syntax@^0.89.0":
+  version "0.89.0"
+  resolved "https://registry.yarnpkg.com/@glimmer/syntax/-/syntax-0.89.0.tgz#caefe498584bb547266cd184f7b02a1d886300fc"
+  integrity sha512-pzj/z3WEGeBC5FP7XIAwcCQfz8mKXHUR1K/cIh0tRXtURpVb7p91y3lwz7wCjnZ9tDzLVI21swQHY/sTpFODTA==
+  dependencies:
+    "@glimmer/interfaces" "^0.89.0"
+    "@glimmer/util" "^0.89.0"
+    "@glimmer/wire-format" "^0.89.0"
+    "@handlebars/parser" "~2.0.0"
+    simple-html-tokenizer "^0.5.11"
+
 "@glimmer/tracking@^1.1.2":
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/@glimmer/tracking/-/tracking-1.1.2.tgz#74e71be07b0a7066518d24044d2665d0cf8281eb"
@@ -1814,6 +1832,14 @@
     "@glimmer/env" "0.1.7"
     "@glimmer/interfaces" "^0.88.1"
 
+"@glimmer/util@^0.89.0":
+  version "0.89.0"
+  resolved "https://registry.yarnpkg.com/@glimmer/util/-/util-0.89.0.tgz#00e46288cb33bc17ceaaa04542cdd06662541667"
+  integrity sha512-hxdObRAqd4LGfoNLkXxsRbaQJuTs7+HbL5hwPkH48xGNBlFAUH8bjUCiFsVhfOwZ8r2WHThj05EgGUAOkuVkAw==
+  dependencies:
+    "@glimmer/env" "0.1.7"
+    "@glimmer/interfaces" "^0.89.0"
+
 "@glimmer/validator@0.84.3", "@glimmer/validator@^0.84.3":
   version "0.84.3"
   resolved "https://registry.yarnpkg.com/@glimmer/validator/-/validator-0.84.3.tgz#cd83b7f9ab78953f23cc11a32d83d7f729c54df2"
@@ -1858,6 +1884,14 @@
     "@glimmer/interfaces" "^0.88.1"
     "@glimmer/util" "^0.88.1"
 
+"@glimmer/wire-format@^0.89.0":
+  version "0.89.0"
+  resolved "https://registry.yarnpkg.com/@glimmer/wire-format/-/wire-format-0.89.0.tgz#cf76bddb3d5de44a0f74c9aa9ae66d08567ba572"
+  integrity sha512-pbexstQ92jCcFYf1PGXusKklhWwKrxU7Ornj8HeENxTctdyVLff9ynOdpJ1Yq7buiru3E8NhGjFOnNwfPIvbKg==
+  dependencies:
+    "@glimmer/interfaces" "^0.89.0"
+    "@glimmer/util" "^0.89.0"
+
 "@glint/core@^1.3.0":
   version "1.3.0"
   resolved "https://registry.yarnpkg.com/@glint/core/-/core-1.3.0.tgz#9af9414bca52733a1295e74ab17e49bc165d2b18"