diff --git a/client/src/monaco-language-client.ts b/client/src/monaco-language-client.ts
index 7e58f750b..01b57c2f9 100644
--- a/client/src/monaco-language-client.ts
+++ b/client/src/monaco-language-client.ts
@@ -12,6 +12,8 @@ import { ImplementationFeature } from "vscode-languageclient/lib/implementation"
 import { ColorProviderFeature } from "vscode-languageclient/lib/colorProvider";
 import { WorkspaceFoldersFeature } from "vscode-languageclient/lib/workspaceFolders";
 import { FoldingRangeFeature } from "vscode-languageclient/lib/foldingRange";
+import { CallHierarchyFeature } from "vscode-languageclient/lib/callHierarchy.proposed";
+import { SemanticTokensFeature } from "vscode-languageclient/lib/semanticTokens.proposed";
 import * as p2c from 'vscode-languageclient/lib/protocolConverter';
 import * as c2p from 'vscode-languageclient/lib/codeConverter';
 import { IConnectionProvider, IConnection } from './connection';
@@ -105,6 +107,11 @@ export class MonacoLanguageClient extends BaseLanguageClient {
         }
     }
 
+    public registerProposedFeatures() {
+        this.registerFeature(new CallHierarchyFeature(this));
+		this.registerFeature(new SemanticTokensFeature(this));
+	}
+
 }
 export namespace MonacoLanguageClient {
     export interface Options {