diff --git a/package-lock.json b/package-lock.json
index cc5a6bb6..fca2be77 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -219,15 +219,15 @@
 			}
 		},
 		"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": {
@@ -443,9 +443,9 @@
 			"dev": true
 		},
 		"vscode-css-languageservice": {
-			"version": "5.1.5",
-			"resolved": "https://registry.npmjs.org/vscode-css-languageservice/-/vscode-css-languageservice-5.1.5.tgz",
-			"integrity": "sha512-c1hhsbnZ7bBvj10vMDLmkOk/n9r0rXQYDj4kbBi59bZaaEZ3e81zURx76/618NZM5NytlZmGfvmxQtB7mb03Ow==",
+			"version": "5.1.8",
+			"resolved": "https://registry.npmjs.org/vscode-css-languageservice/-/vscode-css-languageservice-5.1.8.tgz",
+			"integrity": "sha512-Si1sMykS8U/p8LYgLGPCfZD1YFT0AtvUJQp9XJGw64DZWhtwYo28G2l64USLS9ge4ZPMZpwdpOK7PfbVKfgiiA==",
 			"dev": true,
 			"requires": {
 				"vscode-languageserver-textdocument": "^1.0.1",
@@ -455,9 +455,9 @@
 			}
 		},
 		"vscode-languageserver-textdocument": {
-			"version": "1.0.1",
-			"resolved": "https://registry.npmjs.org/vscode-languageserver-textdocument/-/vscode-languageserver-textdocument-1.0.1.tgz",
-			"integrity": "sha512-UIcJDjX7IFkck7cSkNNyzIz5FyvpQfY7sdzVy+wkKN/BLaD4DQ0ppXQrKePomCxTS7RrolK1I0pey0bG9eh8dA==",
+			"version": "1.0.2",
+			"resolved": "https://registry.npmjs.org/vscode-languageserver-textdocument/-/vscode-languageserver-textdocument-1.0.2.tgz",
+			"integrity": "sha512-T7uPC18+f8mYE4lbVZwb3OSmvwTZm3cuFhrdx9Bn2l11lmp3SvSuSVjy2JtvrghzjAo4G6Trqny2m9XGnFnWVA==",
 			"dev": true
 		},
 		"vscode-languageserver-types": {
diff --git a/package.json b/package.json
index bd78db46..3ffd0b7f 100644
--- a/package.json
+++ b/package.json
@@ -23,17 +23,17 @@
 	"typings": "./release/esm/monaco.contribution.d.ts",
 	"devDependencies": {
 		"husky": "^5.1.3",
-		"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",
 		"requirejs": "^2.3.6",
 		"typescript": "4.3.2",
 		"terser": "^5.7.0",
-		"vscode-css-languageservice": "^5.1.5",
+		"vscode-css-languageservice": "^5.1.8",
 		"vscode-languageserver-types": "3.16.0",
-		"vscode-languageserver-textdocument": "^1.0.1"
+		"vscode-languageserver-textdocument": "^1.0.2"
 	},
 	"husky": {
 		"hooks": {
diff --git a/src/languageFeatures.ts b/src/languageFeatures.ts
index fbb776b3..3e998317 100644
--- a/src/languageFeatures.ts
+++ b/src/languageFeatures.ts
@@ -37,7 +37,7 @@ export class DiagnosticsAdapter {
 		defaults: LanguageServiceDefaults
 	) {
 		const onModelAdd = (model: editor.IModel): void => {
-			let modeId = model.getModeId();
+			let modeId = model.getLanguageId();
 			if (modeId !== this._languageId) {
 				return;
 			}
@@ -73,7 +73,7 @@ export class DiagnosticsAdapter {
 
 		defaults.onDidChange((_) => {
 			editor.getModels().forEach((model) => {
-				if (model.getModeId() === this._languageId) {
+				if (model.getLanguageId() === this._languageId) {
 					onModelRemoved(model);
 					onModelAdd(model);
 				}
@@ -104,7 +104,7 @@ export class DiagnosticsAdapter {
 			.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);
 				}
 			})