diff --git a/cnn_classification_service/magic_doer.py b/cnn_classification_service/magic_doer.py
index 5026537..bfde9f5 100644
--- a/cnn_classification_service/magic_doer.py
+++ b/cnn_classification_service/magic_doer.py
@@ -23,7 +23,7 @@ class MagicDoer:
 
         tag = parameters['tag']
         sample_file_handle, sample_file_path = tempfile.mkstemp(prefix=f"{tag}_", suffix=".wav", dir="/dev/shm")
-        span = opentracing.tracer.scope_manager.active().span
+        span = opentracing.tracer.scope_manager.active.span
         span.log_kv({'event': 'sampleFileOpened', 'sampleTag': tag})
         response = None
         try:
@@ -64,7 +64,7 @@ class MagicDoer:
             except FileNotFoundError:
                 pass
 
-        span = opentracing.tracer.scope_manager.active().span
+        span = opentracing.tracer.scope_manager.active.span
         span.log_kv({'event': 'sampleFileDeleted', 'sampleTag': tag})
 
         if not response: