diff --git a/extensions/css-language-features/.vscode/settings.json b/extensions/css-language-features/.vscode/settings.json
new file mode 100644
index 00000000000..5b30e2983c2
--- /dev/null
+++ b/extensions/css-language-features/.vscode/settings.json
@@ -0,0 +1,5 @@
+{
+  "prettier.semi": true,
+  "prettier.singleQuote": true,
+  "prettier.printWidth": 120,
+}
\ No newline at end of file
diff --git a/extensions/css-language-features/server/package.json b/extensions/css-language-features/server/package.json
index b48257bb0c5..678ddaec04c 100644
--- a/extensions/css-language-features/server/package.json
+++ b/extensions/css-language-features/server/package.json
@@ -9,7 +9,7 @@
   },
   "main": "./out/cssServerMain",
   "dependencies": {
-    "vscode-css-languageservice": "^3.0.13-next.7",
+    "vscode-css-languageservice": "^3.0.13-next.8",
     "vscode-languageserver": "^5.1.0"
   },
   "devDependencies": {
diff --git a/extensions/css-language-features/server/src/cssServerMain.ts b/extensions/css-language-features/server/src/cssServerMain.ts
index c5fd3bdb65d..3ef166f1b80 100644
--- a/extensions/css-language-features/server/src/cssServerMain.ts
+++ b/extensions/css-language-features/server/src/cssServerMain.ts
@@ -7,15 +7,14 @@ import {
 	createConnection, IConnection, TextDocuments, InitializeParams, InitializeResult, ServerCapabilities, ConfigurationRequest, WorkspaceFolder
 } from 'vscode-languageserver';
 import URI from 'vscode-uri';
-import * as fs from 'fs';
 import { TextDocument, CompletionList, Position } from 'vscode-languageserver-types';
 
-import { getCSSLanguageService, getSCSSLanguageService, getLESSLanguageService, LanguageSettings, LanguageService, Stylesheet, CSSData } from 'vscode-css-languageservice';
+import { getCSSLanguageService, getSCSSLanguageService, getLESSLanguageService, LanguageSettings, LanguageService, Stylesheet } from 'vscode-css-languageservice';
 import { getLanguageModelCache } from './languageModelCache';
 import { getPathCompletionParticipant } from './pathCompletion';
 import { formatError, runSafe } from './utils/runner';
 import { getDocumentContext } from './utils/documentContext';
-import { parseCSSData } from './utils/languageFacts';
+import { getDataProviders } from './customData';
 
 export interface Settings {
 	css: LanguageSettings;
@@ -66,17 +65,7 @@ connection.onInitialize((params: InitializeParams): InitializeResult => {
 	}
 
 	const dataPaths: string[] = params.initializationOptions.dataPaths;
-
-	const customDataCollections: CSSData[] = [];
-
-	dataPaths.forEach(p => {
-		if (fs.existsSync(p)) {
-			const data = parseCSSData(fs.readFileSync(p, 'utf-8'));
-			customDataCollections.push(data);
-		} else {
-			return;
-		}
-	});
+	const customDataProviders = getDataProviders(dataPaths);
 
 	function getClientCapability<T>(name: string, def: T) {
 		const keys = name.split('.');
@@ -93,9 +82,9 @@ connection.onInitialize((params: InitializeParams): InitializeResult => {
 	scopedSettingsSupport = !!getClientCapability('workspace.configuration', false);
 	foldingRangeLimit = getClientCapability('textDocument.foldingRange.rangeLimit', Number.MAX_VALUE);
 
-	languageServices.css = getCSSLanguageService({ customDataCollections });
-	languageServices.scss = getSCSSLanguageService({ customDataCollections });
-	languageServices.less = getLESSLanguageService({ customDataCollections });
+	languageServices.css = getCSSLanguageService({ customDataProviders });
+	languageServices.scss = getSCSSLanguageService({ customDataProviders });
+	languageServices.less = getLESSLanguageService({ customDataProviders });
 
 	const capabilities: ServerCapabilities = {
 		// Tell the client that the server works in FULL text document sync mode
diff --git a/extensions/css-language-features/server/src/customData.ts b/extensions/css-language-features/server/src/customData.ts
new file mode 100644
index 00000000000..3b253648d42
--- /dev/null
+++ b/extensions/css-language-features/server/src/customData.ts
@@ -0,0 +1,47 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { CSSData, ICSSDataProvider } from 'vscode-css-languageservice';
+import * as fs from 'fs';
+
+export function getDataProviders(dataPaths: string[]): ICSSDataProvider[] {
+	const providers = dataPaths.map(p => {
+		if (fs.existsSync(p)) {
+			const data = parseCSSData(fs.readFileSync(p, 'utf-8'));
+			return {
+				provideProperties: () => data.properties || [],
+				provideAtDirectives: () => data.atDirectives || [],
+				providePseudoClasses: () => data.pseudoClasses || [],
+				providePseudoElements: () => data.pseudoElements || []
+			};
+		} else {
+			return {
+				provideProperties: () => [],
+				provideAtDirectives: () => [],
+				providePseudoClasses: () => [],
+				providePseudoElements: () => []
+			};
+		}
+	});
+
+	return providers;
+}
+
+function parseCSSData(source: string): CSSData {
+	let rawData: any;
+
+	try {
+		rawData = JSON.parse(source);
+	} catch (err) {
+		return {};
+	}
+
+	return {
+		properties: rawData.properties || [],
+		atDirectives: rawData.atdirectives || [],
+		pseudoClasses: rawData.pseudoclasses || [],
+		pseudoElements: rawData.pseudoelements || []
+	};
+}
diff --git a/extensions/css-language-features/server/src/utils/languageFacts.ts b/extensions/css-language-features/server/src/utils/languageFacts.ts
deleted file mode 100644
index c6d9b2ee641..00000000000
--- a/extensions/css-language-features/server/src/utils/languageFacts.ts
+++ /dev/null
@@ -1,23 +0,0 @@
-/*---------------------------------------------------------------------------------------------
- *  Copyright (c) Microsoft Corporation. All rights reserved.
- *  Licensed under the MIT License. See License.txt in the project root for license information.
- *--------------------------------------------------------------------------------------------*/
-
-import { CSSData } from 'vscode-css-languageservice';
-
-export function parseCSSData(source: string): CSSData {
-	let rawData: any;
-
-	try {
-		rawData = JSON.parse(source);
-	} catch (err) {
-		return {};
-	}
-
-	return {
-		properties: rawData.properties || [],
-		atDirectives: rawData.atdirectives || [],
-		pseudoClasses: rawData.pseudoclasses || [],
-		pseudoElements: rawData.pseudoelements || []
-	};
-}
diff --git a/extensions/css-language-features/server/yarn.lock b/extensions/css-language-features/server/yarn.lock
index 53a82e931a8..af0f5782494 100644
--- a/extensions/css-language-features/server/yarn.lock
+++ b/extensions/css-language-features/server/yarn.lock
@@ -229,10 +229,10 @@ supports-color@5.4.0:
   dependencies:
     has-flag "^3.0.0"
 
-vscode-css-languageservice@^3.0.13-next.7:
-  version "3.0.13-next.7"
-  resolved "https://registry.yarnpkg.com/vscode-css-languageservice/-/vscode-css-languageservice-3.0.13-next.7.tgz#48392edbf35ce60c54aeaf8d3e83c994d6c4c84e"
-  integrity sha512-2Z28n0CVwwNpdDmoIbjUMJPnchm+eRJE/PhhjXss/p0CnSJfXzbll3Ay1V+nDLW2NIGap0CJFbbfT+cilyivIA==
+vscode-css-languageservice@^3.0.13-next.8:
+  version "3.0.13-next.8"
+  resolved "https://registry.yarnpkg.com/vscode-css-languageservice/-/vscode-css-languageservice-3.0.13-next.8.tgz#3e019c9166914fcbd8b71530ff32b438698206fa"
+  integrity sha512-YjoIMCvZSegs7UOogehQjrfNybBL3MDVN2jx/uxFFw0VKFGAiyZkjfQiipEg36jbKL4LKHiBUoutoHYMF2PGfw==
   dependencies:
     vscode-languageserver-types "^3.13.0"
     vscode-nls "^4.0.0"