diff --git a/src/common/method_wrappers/Decorator.py b/src/common/method_wrappers/Decorator.py
index 197378dadc2ff85c673c3b4929c2cc6bfd6a3383..98ade3fc0d382579e330d1fa8b8497d4c82471e6 100644
--- a/src/common/method_wrappers/Decorator.py
+++ b/src/common/method_wrappers/Decorator.py
@@ -76,7 +76,7 @@ class MetricsPool:
 
     def get_metrics(
         self, method : str, labels : Optional[Dict[str, str]] = None
-    ) -> Tuple[Histogram, Counter, Counter, Counter]:
+    ) -> Tuple[MetricWrapperBase, MetricWrapperBase, MetricWrapperBase, MetricWrapperBase]:
         histogram_duration : Histogram = self.get_or_create(method, MetricTypeEnum.HISTOGRAM_DURATION)
         counter_started    : Counter   = self.get_or_create(method, MetricTypeEnum.COUNTER_STARTED)
         counter_completed  : Counter   = self.get_or_create(method, MetricTypeEnum.COUNTER_COMPLETED)