diff --git a/src/main/java/com/loafle/overflow/proxy/ServiceInvoker.java b/src/main/java/com/loafle/overflow/proxy/ServiceInvoker.java
index d9b3026..40012b5 100644
--- a/src/main/java/com/loafle/overflow/proxy/ServiceInvoker.java
+++ b/src/main/java/com/loafle/overflow/proxy/ServiceInvoker.java
@@ -2,6 +2,8 @@ package com.loafle.overflow.proxy;
 
 import com.google.gson.internal.Primitives;
 import com.google.protobuf.ByteString;
+import com.loafle.overflow.commons.exception.OverflowException;
+import com.loafle.overflow.commons.exception.OverflowRuntimeException;
 import com.loafle.overflow.proxy.exception.InvalidParameterException;
 import com.loafle.overflow.proxy.exception.InvalidRequestException;
 import com.loafle.overflow.proxy.exception.NoSuchMethodException;
@@ -156,7 +158,7 @@ public class ServiceInvoker {
     }
 
 
-    public String invoke(String serviceName, String methodName, List<ByteString> params) throws Throwable {
+    public String invoke(String serviceName, String methodName, List<ByteString> params) throws OverflowException, OverflowRuntimeException {
         Cache serviceCache = getServiceCache(serviceName);
         Cache.MethodCache methodCache = serviceCache.getMethodCache(methodName);
 
@@ -182,7 +184,11 @@ public class ServiceInvoker {
         } catch (IllegalAccessException e) {
             throw new InvalidRequestException();
         } catch (InvocationTargetException e) {
-            throw e.getTargetException();
+            Throwable t = e.getTargetException();
+            if (t instanceof OverflowRuntimeException) {
+                throw (OverflowRuntimeException)t;
+            }
+            throw new InvalidRequestException();
         }
 
         try {