diff --git a/package-lock.json b/package-lock.json
index 6ce5d3f..a5692ce 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
             "dependencies": {
                 "vscode-languageserver": "^7.0.0",
                 "vscode-languageserver-textdocument": "^1.0.3",
-                "yaml": "^2.0.0-9"
+                "yaml": "^2.0.0-10"
             },
             "devDependencies": {
                 "@types/chai": "^4.3.0",
@@ -2156,9 +2156,9 @@
             "dev": true
         },
         "node_modules/yaml": {
-            "version": "2.0.0-9",
-            "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.0.0-9.tgz",
-            "integrity": "sha512-Bf2KowHjyVkIIiGMt7+fbhmlvKOaE8DWuD07bnL4+FQ9sPmEl/5IzGpBpoxPqOaHuyasBjJhyXDcISpJWfhCGw==",
+            "version": "2.0.0-10",
+            "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.0.0-10.tgz",
+            "integrity": "sha512-FHV8s5ODFFQXX/enJEU2EkanNl1UDBUz8oa4k5Qo/sR+Iq7VmhCDkRMb0/mjJCNeAWQ31W8WV6PYStDE4d9EIw==",
             "engines": {
                 "node": ">= 12"
             }
@@ -3738,9 +3738,9 @@
             "dev": true
         },
         "yaml": {
-            "version": "2.0.0-9",
-            "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.0.0-9.tgz",
-            "integrity": "sha512-Bf2KowHjyVkIIiGMt7+fbhmlvKOaE8DWuD07bnL4+FQ9sPmEl/5IzGpBpoxPqOaHuyasBjJhyXDcISpJWfhCGw=="
+            "version": "2.0.0-10",
+            "resolved": "https://registry.npmjs.org/yaml/-/yaml-2.0.0-10.tgz",
+            "integrity": "sha512-FHV8s5ODFFQXX/enJEU2EkanNl1UDBUz8oa4k5Qo/sR+Iq7VmhCDkRMb0/mjJCNeAWQ31W8WV6PYStDE4d9EIw=="
         },
         "yargs": {
             "version": "16.2.0",
diff --git a/package.json b/package.json
index a32342c..da9985f 100644
--- a/package.json
+++ b/package.json
@@ -42,6 +42,6 @@
     "dependencies": {
         "vscode-languageserver": "^7.0.0",
         "vscode-languageserver-textdocument": "^1.0.3",
-        "yaml": "^2.0.0-9"
+        "yaml": "^2.0.0-10"
     }
 }
diff --git a/src/service/ComposeDocument.ts b/src/service/ComposeDocument.ts
index 615b718..5c389ea 100644
--- a/src/service/ComposeDocument.ts
+++ b/src/service/ComposeDocument.ts
@@ -5,24 +5,16 @@
 
 import { ErrorCodes, Position, Range, ResponseError, TextDocumentIdentifier, TextDocumentsConfiguration } from 'vscode-languageserver';
 import { TextDocument } from 'vscode-languageserver-textdocument';
-import { CST, Document as YamlDocument, Parser, Composer, isDocument } from 'yaml';
+import { Document as YamlDocument, isDocument, parseDocument } from 'yaml';
 import { CRLF, DocumentSettings, DocumentSettingsParams, DocumentSettingsRequest, LF } from '../client/DocumentSettings';
 import { ExtendedPositionParams, PositionInfo } from './ExtendedParams';
 import { getCurrentContext } from './utils/ActionContext';
 import { Lazy } from './utils/Lazy';
 
-const EmptyDocumentCST: CST.Document = {
-    type: 'document',
-    offset: 0,
-    start: [],
-};
-
 // The stated behavior of character number in the `Position` class is to roll back to line length if it exceeds the line length. So, this will work for any line <1m characters. That should cover most of them.
 const MaximumLineLength = 1000 * 1000;
 
 export class ComposeDocument {
-    public readonly fullCst = new Lazy(() => this.buildFullCst());
-    public readonly documentCst = new Lazy(() => this.buildDocumentCst());
     public readonly yamlDocument = new Lazy(() => this.buildYamlDocument());
 
     private documentSettings: DocumentSettings | undefined;
@@ -45,8 +37,6 @@ export class ComposeDocument {
     private update(doc: TextDocument): ComposeDocument {
         this.#textDocument = doc;
         this.yamlDocument.clear();
-        this.documentCst.clear();
-        this.fullCst.clear();
 
         return this;
     }
@@ -157,20 +147,8 @@ export class ComposeDocument {
         update: (document, changes, version) => document.update(TextDocument.update(document.textDocument, changes, version)),
     };
 
-    private buildFullCst(): CST.Token[] {
-        return Array.from(new Parser().parse(this.textDocument.getText()));
-    }
-
-    private buildDocumentCst(): CST.Document {
-        // The CST can consist of more than just the document
-        // Get the first `type === 'document'` item out of the list; this is the actual document
-        // If there isn't one, return `EmptyDocumentCST`
-        return this.fullCst.value.find(t => t.type === 'document') as CST.Document || EmptyDocumentCST;
-    }
-
     private buildYamlDocument(): YamlDocument {
-        const composedTokens = new Composer({ merge: true }).compose(this.fullCst.value, true);
-        const [yamlDocument] = composedTokens;
+        const yamlDocument = parseDocument(this.textDocument.getText(), { merge: true, prettyErrors: true });
 
         if (!isDocument(yamlDocument)) {
             throw new ResponseError(ErrorCodes.ParseError, 'Malformed YAML document');
diff --git a/src/test/providers/DiagnosticProvider.test.ts b/src/test/providers/DiagnosticProvider.test.ts
index 17e06d0..a21bfba 100644
--- a/src/test/providers/DiagnosticProvider.test.ts
+++ b/src/test/providers/DiagnosticProvider.test.ts
@@ -68,7 +68,7 @@ services:
                 },
                 {
                     range: Range.create(8, 0, 8, 0),
-                    contentCanary: 'sequence to end with ]',
+                    contentCanary: 'and end with a ]',
                 },
             ];