diff --git a/package.json b/package.json
index af23e996..0bf0b32c 100644
--- a/package.json
+++ b/package.json
@@ -32,7 +32,7 @@
   "devDependencies": {
     "@ember/optional-features": "2.0.0",
     "@ember/test-helpers": "2.9.3",
-    "@glimmer/syntax": "0.84.3",
+    "@glimmer/syntax": "0.85.6",
     "@glimmer/syntax-0.35.11": "npm:@glimmer/syntax@0.35.11",
     "@glimmer/syntax-0.37.1": "npm:@glimmer/syntax@0.37.1",
     "@glimmer/syntax-0.40.1": "npm:@glimmer/syntax@0.40.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 8a16c4e1..904c6362 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1,5 +1,9 @@
 lockfileVersion: '6.0'
 
+settings:
+  autoInstallPeers: true
+  excludeLinksFromLockfile: false
+
 dependencies:
   hash-obj:
     specifier: ^3.0.0
@@ -13,8 +17,8 @@ devDependencies:
     specifier: 2.9.3
     version: 2.9.3(@babel/core@7.21.8)(ember-source@4.12.0)
   '@glimmer/syntax':
-    specifier: 0.84.3
-    version: 0.84.3
+    specifier: 0.85.6
+    version: 0.85.6
   '@glimmer/syntax-0.35.11':
     specifier: npm:@glimmer/syntax@0.35.11
     version: /@glimmer/syntax@0.35.11
@@ -1583,8 +1587,8 @@ packages:
       '@simple-dom/interface': 1.4.0
     dev: true
 
-  /@glimmer/interfaces@0.84.3:
-    resolution: {integrity: sha512-dk32ykoNojt0mvEaIW6Vli5MGTbQo58uy3Epj7ahCgTHmWOKuw/0G83f2UmFprRwFx689YTXG38I/vbpltEjzg==}
+  /@glimmer/interfaces@0.85.6:
+    resolution: {integrity: sha512-rLdrDbAAtcn8TeePjcnVp5C0Mj2S4ulGKu9wk/1PxQbIvi9Rojoc4qCsDMTeU8RH54DrlOHbwuLIUzDEKIi/jw==}
     dependencies:
       '@simple-dom/interface': 1.4.0
     dev: true
@@ -1625,11 +1629,12 @@ packages:
       simple-html-tokenizer: 0.5.11
     dev: true
 
-  /@glimmer/syntax@0.84.3:
-    resolution: {integrity: sha512-ioVbTic6ZisLxqTgRBL2PCjYZTFIwobifCustrozRU2xGDiYvVIL0vt25h2c1ioDsX59UgVlDkIK4YTAQQSd2A==}
+  /@glimmer/syntax@0.85.6:
+    resolution: {integrity: sha512-6CfFVVqiK2N8peYydhzPUvXEbD+HQyuing2JAExiBKokHQtdyjf2yrqed3AdBhEMASp1hoIR3yTZCnLAaCGM7w==}
     dependencies:
-      '@glimmer/interfaces': 0.84.3
-      '@glimmer/util': 0.84.3
+      '@glimmer/interfaces': 0.85.6
+      '@glimmer/util': 0.85.6
+      '@glimmer/wire-format': 0.85.6
       '@handlebars/parser': 2.0.0
       simple-html-tokenizer: 0.5.11
     dev: true
@@ -1658,12 +1663,11 @@ packages:
       '@simple-dom/interface': 1.4.0
     dev: true
 
-  /@glimmer/util@0.84.3:
-    resolution: {integrity: sha512-qFkh6s16ZSRuu2rfz3T4Wp0fylFj3HBsONGXQcrAdZjdUaIS6v3pNj6mecJ71qRgcym9Hbaq/7/fefIwECUiKw==}
+  /@glimmer/util@0.85.6:
+    resolution: {integrity: sha512-Jq6ALWC2R9e0BZH+5D8axGZETb9KHJN/osgPX2il7v4NcZLbDrcmMjunUk7EWXvh7EzsjGjFeh2HMDIGq1EORQ==}
     dependencies:
       '@glimmer/env': 0.1.7
-      '@glimmer/interfaces': 0.84.3
-      '@simple-dom/interface': 1.4.0
+      '@glimmer/interfaces': 0.85.6
     dev: true
 
   /@glimmer/vm-babel-plugins@0.84.2(@babel/core@7.21.8):
@@ -1686,6 +1690,13 @@ packages:
       '@glimmer/util': 0.37.1
     dev: true
 
+  /@glimmer/wire-format@0.85.6:
+    resolution: {integrity: sha512-TaAr/nFyKkhN5tHkzp5TnqlKPzNtr5Sw6w927p56mnxS2OMgG+3IorYiw/jBWNPRYi8GrBl1wztzWZ+z75CzAg==}
+    dependencies:
+      '@glimmer/interfaces': 0.85.6
+      '@glimmer/util': 0.85.6
+    dev: true
+
   /@handlebars/parser@1.1.0:
     resolution: {integrity: sha512-rR7tJoSwJ2eooOpYGxGGW95sLq6GXUaS1UtWvN7pei6n2/okYvCGld9vsUTvkl2migxbkszsycwtMf/GEc1k1A==}
     dev: true
@@ -7426,6 +7437,7 @@ packages:
   /iconv-lite@0.6.3:
     resolution: {integrity: sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==}
     engines: {node: '>=0.10.0'}
+    requiresBuild: true
     dependencies:
       safer-buffer: 2.1.2
     dev: true