diff --git a/package-lock.json b/package-lock.json
index b23e6c43..f69c97e6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -225,15 +225,15 @@
 			}
 		},
 		"monaco-editor-core": {
-			"version": "0.28.1",
-			"resolved": "https://registry.npmjs.org/monaco-editor-core/-/monaco-editor-core-0.28.1.tgz",
-			"integrity": "sha512-ikNy6KXmgKhV66W7xLkdECJLAAzDycUe6rhXbdmUaa6L23X70Y0jOaCj/W9gqAo4wUT3MpRmeKEgujNKKH9p8A==",
+			"version": "0.30.0",
+			"resolved": "https://registry.npmjs.org/monaco-editor-core/-/monaco-editor-core-0.30.0.tgz",
+			"integrity": "sha512-vFJ7BEOCqLv4xWgFW+UheI/PtccHHNht29lNmo79Re1kNhWCBLLb2nThjRMLPO1rd41vX9hhd9C07/iKOk9/jQ==",
 			"dev": true
 		},
 		"monaco-languages": {
-			"version": "2.4.0",
-			"resolved": "https://registry.npmjs.org/monaco-languages/-/monaco-languages-2.4.0.tgz",
-			"integrity": "sha512-63ZMAPgqBylS0kyC22QSKJWJmCRcwM7dWql1xtt9R7mCfzszfIIViSTiJ5vDSnzj0lH0aZh8OJggh/uZY6Vgnw==",
+			"version": "2.11.0",
+			"resolved": "https://registry.npmjs.org/monaco-languages/-/monaco-languages-2.11.0.tgz",
+			"integrity": "sha512-fpeP8XUPejcdoUEMZ5bo4MW8VzEadhrsuyDtT48p2a2PSRT/CXptQm4eGnIfgxf5R95jrCZ0456c5dSEPBuktA==",
 			"dev": true
 		},
 		"monaco-plugin-helpers": {
diff --git a/package.json b/package.json
index 15212c39..92ef4ac3 100644
--- a/package.json
+++ b/package.json
@@ -24,8 +24,8 @@
 	"devDependencies": {
 		"husky": "^5.1.3",
 		"jsonc-parser": "^3.0.0",
-		"monaco-editor-core": "0.28.1",
-		"monaco-languages": "2.4.0",
+		"monaco-editor-core": "0.30.0",
+		"monaco-languages": "2.11.0",
 		"monaco-plugin-helpers": "^1.0.3",
 		"prettier": "^2.2.1",
 		"pretty-quick": "^3.1.0",
diff --git a/src/languageFeatures.ts b/src/languageFeatures.ts
index 62b47778..5de634bb 100644
--- a/src/languageFeatures.ts
+++ b/src/languageFeatures.ts
@@ -35,7 +35,7 @@ export class DiagnosticsAdapter {
 		defaults: LanguageServiceDefaults
 	) {
 		const onModelAdd = (model: editor.IModel): void => {
-			let modeId = model.getModeId();
+			let modeId = model.getLanguageId();
 			if (modeId !== this._languageId) {
 				return;
 			}
@@ -77,7 +77,7 @@ export class DiagnosticsAdapter {
 		this._disposables.push(
 			defaults.onDidChange((_) => {
 				editor.getModels().forEach((model) => {
-					if (model.getModeId() === this._languageId) {
+					if (model.getLanguageId() === this._languageId) {
 						onModelRemoved(model);
 						onModelAdd(model);
 					}
@@ -114,7 +114,7 @@ export class DiagnosticsAdapter {
 				return worker.doValidation(resource.toString()).then((diagnostics) => {
 					const markers = diagnostics.map((d) => toDiagnostics(resource, d));
 					let model = editor.getModel(resource);
-					if (model && model.getModeId() === languageId) {
+					if (model && model.getLanguageId() === languageId) {
 						editor.setModelMarkers(model, languageId, markers);
 					}
 				});