diff --git a/src/vs/base/common/uri.ts b/src/vs/base/common/uri.ts
index 5fe794d4581ac32b6d0e700bdad440fe8f580761..4a6f69ea626c7b4f15b9555c261ce5fbd46b345d 100644
--- a/src/vs/base/common/uri.ts
+++ b/src/vs/base/common/uri.ts
@@ -191,7 +191,7 @@ export default class URI implements UriComponents {
 
 	// ---- modify to new -------------------------
 
-	public with(change: { scheme?: string; authority?: string; path?: string; query?: string; fragment?: string }): URI {
+	public with(change: { scheme?: string; authority?: string | null; path?: string | null; query?: string | null; fragment?: string | null }): URI {
 
 		if (!change) {
 			return this;
@@ -307,7 +307,7 @@ export default class URI implements UriComponents {
 		return new _URI('file', authority, path, _empty, _empty);
 	}
 
-	public static from(components: { scheme?: string; authority?: string; path?: string; query?: string; fragment?: string }): URI {
+	public static from(components: { scheme: string; authority?: string; path?: string; query?: string; fragment?: string }): URI {
 		return new _URI(
 			components.scheme,
 			components.authority,
diff --git a/src/vs/monaco.d.ts b/src/vs/monaco.d.ts
index 18baa911399e6f89405127e8c017a652285656e6..b8394da57dc767e517045b1adefdbf9ddc6a258f 100644
--- a/src/vs/monaco.d.ts
+++ b/src/vs/monaco.d.ts
@@ -163,10 +163,10 @@ declare namespace monaco {
 		readonly fsPath: string;
 		with(change: {
 			scheme?: string;
-			authority?: string;
-			path?: string;
-			query?: string;
-			fragment?: string;
+			authority?: string | null;
+			path?: string | null;
+			query?: string | null;
+			fragment?: string | null;
 		}): Uri;
 		/**
 		 * Creates a new Uri from a string, e.g. `http://www.msft.com/some/path`,
@@ -199,7 +199,7 @@ declare namespace monaco {
 		 */
 		static file(path: string): Uri;
 		static from(components: {
-			scheme?: string;
+			scheme: string;
 			authority?: string;
 			path?: string;
 			query?: string;