diff --git a/config/puma.rb b/config/puma.rb
index 16821d1..cc61ebb 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -1,2 +1,2 @@
-threads(0, `nproc`.chomp || 5)
+threads(0, `nproc`.chomp.to_i || 5)
 port 4567