diff --git a/api/app/observability.py b/api/app/observability.py
index 38cb8bb..e79dc82 100644
--- a/api/app/observability.py
+++ b/api/app/observability.py
@@ -14,16 +14,14 @@ from opentelemetry.sdk.trace.export import (
 )
 from prometheus_client import start_http_server
 
-
 _observability_initialized = False
 
+
 def setup_observability(app: FastAPI) -> None:
     global _observability_initialized
     if _observability_initialized:
         return
 
-    
-    
     service_name = os.getenv("OTEL_SERVICE_NAME", "language-learning-api")
     metrics_host = os.getenv("OTEL_EXPORTER_PROMETHEUS_HOST", "0.0.0.0")
     metrics_port = int(os.getenv("OTEL_EXPORTER_PROMETHEUS_PORT", "9464"))
@@ -40,10 +38,9 @@ def setup_observability(app: FastAPI) -> None:
     metrics.set_meter_provider(meter_provider)
 
     LoggingInstrumentor().instrument(set_logging_format=True)
+    FastAPIInstrumentor.instrument_app(app)
 
     # Expose OTel metrics for Prometheus scraping on the standard endpoint.
     start_http_server(port=metrics_port, addr=metrics_host)
 
-    
-    
-    _observability_initialized = True
\ No newline at end of file
+    _observability_initialized = True