diff --git a/lib/cli/cli.js b/lib/cli/cli.js
index dc8bacebdd..464ab82e50 100644
--- a/lib/cli/cli.js
+++ b/lib/cli/cli.js
@@ -212,7 +212,10 @@ function validateInput(argv) {
 export async function parseCommandLine() {
   let yargsInstance = yargs(hideBin(process.argv));
   let parsed = yargsInstance
-    .parserConfiguration({ 'deep-merge-config': true })
+    .parserConfiguration({
+      'camel-case-expansion': false,
+      'deep-merge-config': true
+    })
     .env('SITESPEED_IO')
     .usage('$0 [options] <url>/<file>')