diff --git a/src/script/index.ts b/src/script/index.ts
line changes: +1/-1
index 27e311e..7cb41e8
--- a/src/script/index.ts
+++ b/src/script/index.ts

@@ -1,7 +1,7 @@
 import gs from '../gamestate';
 import { Label } from './label';
 import * as nearley from 'nearley';
-import * as parserGrammar from './parser';
+import parserGrammar from './parser';
 
 export enum InstructionStatus {
     OK,

diff --git a/tsconfig.json b/tsconfig.json
line changes: +1/-1
index b06703f..c27fd69
--- a/tsconfig.json
+++ b/tsconfig.json

@@ -6,6 +6,6 @@
 		"downlevelIteration": true,
 		"module": "commonjs",
 		"target": "es5",
-		"lib": [ "DOM", "ES5", "ScriptHost", "es2015" ]
+		"lib": [ "DOM", "ES5", "ScriptHost", "es2019" ]
 	}
 }