diff --git a/components/git/v8.js b/components/git/v8.js
index 753c2e26..b0c2879e 100644
--- a/components/git/v8.js
+++ b/components/git/v8.js
@@ -22,6 +22,7 @@ export function builder(yargs) {
           default: 'lkgr'
         });
         yargs.option('version-bump', {
+          type: 'boolean',
           describe: 'Bump the NODE_MODULE_VERSION constant',
           default: true
         });
@@ -39,10 +40,12 @@ export function builder(yargs) {
       builder: (yargs) => {
         yargs
           .option('bump', {
+            type: 'boolean',
             describe: 'Bump V8 embedder version number or patch version',
             default: true
           })
           .option('squash', {
+            type: 'boolean',
             describe:
                 'If multiple commits are backported, squash them into one',
             default: false
@@ -62,8 +65,8 @@ export function builder(yargs) {
       describe: 'Directory of an existing V8 clone'
     })
     .option('verbose', {
+      type: 'boolean',
       describe: 'Enable verbose output',
-      boolean: true,
       default: false
     });
 }