diff --git a/examples/hello_json/hello_json.zig b/examples/hello_json/hello_json.zig
index 3fbae48c..9f26381d 100644
--- a/examples/hello_json/hello_json.zig
+++ b/examples/hello_json/hello_json.zig
@@ -63,6 +63,6 @@ pub fn main() !void {
     // start worker threads
     zap.start(.{
         .threads = 2,
-        .workers = 2,
+        .workers = 1, // user map cannot be shared among multiple worker processes
     });
 }