diff --git a/server/src/plugin/plugin-host.ts b/server/src/plugin/plugin-host.ts
index 9f7961343..55e4b4113 100644
--- a/server/src/plugin/plugin-host.ts
+++ b/server/src/plugin/plugin-host.ts
@@ -380,6 +380,8 @@ async function createREPLServer(events: EventEmitter): Promise<number> {
         });
         delete ctx.console;
         delete ctx.window;
+        delete ctx.WebSocket;
+        delete ctx.pluginHostAPI;
 
         const replVariables = Object.keys(ctx).filter(key => key !== 'require');