diff --git a/src/serve.py b/src/serve.py
index 048999f..75d8c96 100644
--- a/src/serve.py
+++ b/src/serve.py
@@ -41,7 +41,9 @@ def make_callback(analysis_endpoint):
 def main():
     if CONFIG.service.monitoring_enabled:
         tracemalloc.start()
-        memory_peak_metric = Gauge("pyinfra_memory_peak_per_call", "Pyinfra memory peak when processing a message in Mb")
+        memory_peak_metric = Gauge(
+            "pyinfra_memory_peak_per_call", "Pyinfra memory peak when processing a message in Mb"
+        )
         PROM_REGISTER.register(memory_peak_metric)
 
     webserver = Process(target=run_probing_webserver, args=(set_up_probing_webserver(),))
@@ -63,7 +65,7 @@ def main():
             consumer.consume_and_publish()
             if CONFIG.service.monitoring_enabled:
                 _, peak = tracemalloc.get_traced_memory()
-                memory_peak_metric.set(peak / 10 ** 6)
+                memory_peak_metric.set(peak / 10**6)
         except Exception as err:
             raise ConsumerError from err