diff --git a/.github/workflows/node.js.yml b/.github/workflows/node.js.yml
index 0bb55ff..fd526a8 100644
--- a/.github/workflows/node.js.yml
+++ b/.github/workflows/node.js.yml
@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [ 6.4.0, latest ]
+        node-version: [ 12.20.0, latest ]
 
     steps:
     - uses: actions/checkout@v3
diff --git a/dumpASN1.js b/dumpASN1.js
index ef49965..4f93fa5 100755
--- a/dumpASN1.js
+++ b/dumpASN1.js
@@ -1,5 +1,4 @@
 #!/usr/bin/env node
-'use strict';
 
 import * as fs from 'node:fs';
 import { Base64 } from './base64.js';
diff --git a/parseRFC.js b/parseRFC.js
index 8a68a1c..083a363 100755
--- a/parseRFC.js
+++ b/parseRFC.js
@@ -1,5 +1,4 @@
 #! /usr/bin/env node
-'use strict';
 
 import * as fs from 'node:fs';