diff --git a/bundler.js b/bundler.js
index 4d96bdd..b4f344c 100644
--- a/bundler.js
+++ b/bundler.js
@@ -195,7 +195,7 @@ export async function bundleInstall(gemfile, lockFile, platform, engine, rubyVer
   }
 
   // Number of jobs should scale with runner, up to a point
-  const jobs = Math.min(os.cpus().length, 8)
+  const jobs = Math.min(os.availableParallelism(), 8)
   // Always run 'bundle install' to list the gems
   await exec.exec('bundle', ['install', '--jobs', jobs])
 
diff --git a/dist/index.js b/dist/index.js
index 3b0e557..934a1cd 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -209,7 +209,7 @@ async function bundleInstall(gemfile, lockFile, platform, engine, rubyVersion, b
   }
 
   // Number of jobs should scale with runner, up to a point
-  const jobs = Math.min(os.cpus().length, 8)
+  const jobs = Math.min(os.availableParallelism(), 8)
   // Always run 'bundle install' to list the gems
   await exec.exec('bundle', ['install', '--jobs', jobs])