diff --git a/index.js b/index.js
index 75c1dc7..907686f 100755
--- a/index.js
+++ b/index.js
@@ -9,7 +9,7 @@ import Yargs from "yargs";
 import process from "process";
 import fs from "fs";
 
-const numCPUs = cpus().length;
+const numCPUs = cpus().length > 1 ? cpus().length - 1 : 1;
 const argv = Yargs(process.argv.slice(2))
   .usage("Usage: $0 <command> [options]")
   .example(
diff --git a/package.json b/package.json
index c356c8b..5873f95 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vanity-eth",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "ethereum vanity address generator",
   "main": "index.js",
   "type": "module",