diff --git a/util/tracing/visualization/fedsd.py b/util/tracing/visualization/fedsd.py
index 3eb13d11bc..6cf866fb37 100644
--- a/util/tracing/visualization/fedsd.py
+++ b/util/tracing/visualization/fedsd.py
@@ -134,7 +134,7 @@ def load_and_process_csv_file(csv_file) :
                 x_coor[fed_id] = (padding * 2) + (spacing * (len(actors)-1))
                 fed_df['x1'] = x_coor[fed_id]
                 # Append into trace_df
-                trace_df = trace_df.append(fed_df, sort=False, ignore_index=True)
+                trace_df = pd.concat([trace_df, fed_df])
                 fed_df = fed_df[0:0]
     
     # Sort all traces by physical time and then reset the index