diff --git a/extensions/debug-server-ready/package.json b/extensions/debug-server-ready/package.json
index cd006ce71e6..2ed095cc2d7 100644
--- a/extensions/debug-server-ready/package.json
+++ b/extensions/debug-server-ready/package.json
@@ -10,6 +10,7 @@
 	"activationEvents": [
 		"onDebugResolve"
 	],
+	"enableProposedApi": true,
 	"main": "./out/extension",
 	"scripts": {
 		"compile": "gulp compile-extension:debug-server-ready",