diff --git a/wpiformat/wpiformat/pyformat.py b/wpiformat/wpiformat/pyformat.py
index 4c2a6c2..f9b5bac 100644
--- a/wpiformat/wpiformat/pyformat.py
+++ b/wpiformat/wpiformat/pyformat.py
@@ -1,5 +1,6 @@
 """This task runs black on files with Python extension."""
 
+import multiprocessing as mp
 import subprocess
 import sys
 
@@ -14,10 +15,11 @@ def should_process_file(config_file, name):
     @staticmethod
     def run_batch(config_file, names):
         try:
+            cpu_count = min(60, mp.cpu_count())
             # Force one worker because wpiformat already uses a process pool,
             # and we need to keep the total number of multiprocessing processes
             # below the Windows system limit.
-            args = [sys.executable, "-m", "black", "--workers", "1", "-q"]
+            args = [sys.executable, "-m", "black", "--workers", str(cpu_count), "-q"]
             subprocess.run(args + names)
         except FileNotFoundError:
             print("Error: black not found in PATH. Is it installed?", file=sys.stderr)