diff --git a/a4.js b/a4.js
index 04e0655..2e89c94 100755
--- a/a4.js
+++ b/a4.js
@@ -65,6 +65,7 @@ if (flagged) {
 }
 
 (async () => {
+  const options = program.opts();
   const browser = await puppeteer.launch({
     executablePath: paths.filter(existsSync)[0],
   });
@@ -75,12 +76,12 @@ if (flagged) {
   await page.pdf({
     ...{
       path: pdf,
-      format: program.format,
-      landscape: program.landscape || false,
+      format: options.format,
+      landscape: options.landscape || false,
       /* margins set to 25mm to match Microsoft Word Online defaults */
       margin: { top: "25mm", right: "25mm", bottom: "25mm", left: "25mm" },
     },
-    ...(program.number ? numbering : {}),
+    ...(options.number ? numbering : {}),
   });
 
   await browser.close();
diff --git a/package-lock.json b/package-lock.json
index 2a72206..3c51857 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,7 +9,7 @@
       "version": "0.0.1",
       "license": "MPL-2.0",
       "dependencies": {
-        "commander": "^6.2.1",
+        "commander": "^9.3.0",
         "puppeteer-core": "^14.4.1"
       },
       "bin": {
@@ -122,11 +122,11 @@
       "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg=="
     },
     "node_modules/commander": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-6.2.1.tgz",
-      "integrity": "sha512-U7VdrJFnJgo4xjrHpTzu0yrHPGImdsmD95ZlgYSEajAn2JKzDhDTPG9kBTefmObL2w/ngeZnilk+OV9CG3d7UA==",
+      "version": "9.3.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-9.3.0.tgz",
+      "integrity": "sha512-hv95iU5uXPbK83mjrJKuZyFM/LBAoCV/XhVGkS5Je6tl7sxr6A0ITMw5WoRV46/UaJ46Nllm3Xt7IaJhXTIkzw==",
       "engines": {
-        "node": ">= 6"
+        "node": "^12.20.0 || >=14"
       }
     },
     "node_modules/concat-map": {
@@ -692,9 +692,9 @@
       "integrity": "sha512-jJ0bqzaylmJtVnNgzTeSOs8DPavpbYgEr/b0YL8/2GO3xJEhInFmhKMUnEJQjZumK7KXGFhUy89PrsJWlakBVg=="
     },
     "commander": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/commander/-/commander-6.2.1.tgz",
-      "integrity": "sha512-U7VdrJFnJgo4xjrHpTzu0yrHPGImdsmD95ZlgYSEajAn2JKzDhDTPG9kBTefmObL2w/ngeZnilk+OV9CG3d7UA=="
+      "version": "9.3.0",
+      "resolved": "https://registry.npmjs.org/commander/-/commander-9.3.0.tgz",
+      "integrity": "sha512-hv95iU5uXPbK83mjrJKuZyFM/LBAoCV/XhVGkS5Je6tl7sxr6A0ITMw5WoRV46/UaJ46Nllm3Xt7IaJhXTIkzw=="
     },
     "concat-map": {
       "version": "0.0.1",
diff --git a/package.json b/package.json
index dfe6de4..29e96a8 100644
--- a/package.json
+++ b/package.json
@@ -25,7 +25,7 @@
   "homepage": "https://github.com/maxwell-k/a4#readme",
   "bin": "a4.js",
   "dependencies": {
-    "commander": "^6.2.1",
+    "commander": "^9.3.0",
     "puppeteer-core": "^14.4.1"
   },
   "resolutions": {