diff --git a/src/main/java/com/loafle/overflow/crawler/Crawler.java b/src/main/java/com/loafle/overflow/crawler/Crawler.java
index bc5b1b3..f9408e7 100644
--- a/src/main/java/com/loafle/overflow/crawler/Crawler.java
+++ b/src/main/java/com/loafle/overflow/crawler/Crawler.java
@@ -2,6 +2,7 @@ package com.loafle.overflow.crawler;
 
 import java.util.Map;
 
+import com.loafle.overflow.module.core.exception.OverflowException;
 import com.loafle.overflow.module.sensorconfig.model.SensorConfig;
 
 /**
@@ -10,6 +11,6 @@ import com.loafle.overflow.module.sensorconfig.model.SensorConfig;
 public interface Crawler {
 	String name();
 	String toString();
-	void auth(Map<String, Object> authInfo);
-	Map<String, String> get(SensorConfig sensorConfig);
+	void auth(Map<String, Object> authInfo) throws OverflowException;
+	Map<String, String> get(SensorConfig sensorConfig) throws OverflowException;
 }
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