diff --git a/failslow/failslow/fail_slow_detection.py b/failslow/failslow/fail_slow_detection.py
index 38f9b9de6c5903f136815a3ff5c57e877f38c808..c8bf7fdc903e7a23d4f924df95bab798c9bcff45 100644
--- a/failslow/failslow/fail_slow_detection.py
+++ b/failslow/failslow/fail_slow_detection.py
@@ -68,10 +68,12 @@ def detect_step_time_anomalies(data_df: pd.DataFrame, model_args: Dict):
         anomaly_info["is_anomaly"] = True
         anomaly_info["anomaly_count_times"] = len(anomalies)
         anomaly_info["anomaly_info"] = anomalies
+        anomaly_info["anomaly_type"] = AnomalyType.fail_slow
     else:
         anomaly_info["is_anomaly"] = False
         anomaly_info["anomaly_count_times"] = 0
         anomaly_info["anomaly_info"] = []
+        anomaly_info["anomaly_type"] = AnomalyType.normal
     anomaly_info["start_time"] = int(timestamps.iloc[0])
     anomaly_info["end_time"] = int(timestamps.iloc[len(timestamps) - 1])
     return anomaly_info
@@ -187,9 +189,8 @@ def run_slow_node_perception(args: Dict):
             detecting_range_steps[0] = task_stable_step
         logger.info(f"Detection data: {detecting_range_steps}.")
         data = data.loc[detecting_range_steps[0]: detecting_range_steps[1]].reset_index(drop=True)
-        anomaly_info = detect_step_time_anomalies(data, model_args)
+        anomaly_info = detect_step_time_anomalies(data, args)
 
-        anomaly_info["anomaly_type"] = AnomalyType.fail_slow
         write_anomaly_info(anomaly_info, fail_slow_perception_result)
 
         fail_slow_stop_flag = os.getenv('FAIL_SLOW_STOP', 'False').lower() == "true"
diff --git a/failslow/failslow/util/constant.py b/failslow/failslow/util/constant.py
index 3ceb4ea945862b7c5464aec64c54b93e41cc19fc..a1ca94229a069243928b85a921e0b39beffd8518 100644
--- a/failslow/failslow/util/constant.py
+++ b/failslow/failslow/util/constant.py
@@ -19,6 +19,7 @@ HOUR_TO_SECONDS = 3600
 MS_TO_NS = 1e6
 
 class AnomalyType:
+    normal = "normal"
     fail_slow = "failSlow"
     hang = "hang"
 
diff --git a/failslow/setup.py b/failslow/setup.py
index 6ae1e0b651240660572b4f1c1d6e1515171fe519..618f37722267314a85cae082f63158dad5be2127 100644
--- a/failslow/setup.py
+++ b/failslow/setup.py
@@ -46,6 +46,7 @@ setup(
         "matplotlib",
         "joblib",
         "scikit_learn",
+        "protobuf==3.20.3"
     ],
     entry_points={
         "console_scripts": [