diff --git a/src/jp/ac/keio/sfc/ht/sox/soxlib/SoxConnection.java b/src/jp/ac/keio/sfc/ht/sox/soxlib/SoxConnection.java
index afbc633..353c23e 100644
--- a/src/jp/ac/keio/sfc/ht/sox/soxlib/SoxConnection.java
+++ b/src/jp/ac/keio/sfc/ht/sox/soxlib/SoxConnection.java
@@ -104,7 +104,7 @@ public void connect() throws SmackException, IOException, XMPPException {
 		SmackConfiguration.setDefaultPacketReplyTimeout(300 * 1000);
 
 		XMPPTCPConnectionConfiguration config = XMPPTCPConnectionConfiguration.builder().setHost(server).setPort(5222)
-				.setServiceName(service).setSecurityMode(SecurityMode.disabled).setDebuggerEnabled(isDebugEnable)
+				.setServiceName(service).setSecurityMode(SecurityMode.disabled).setDebuggerEnabled(false)
 				.setConnectTimeout(30 * 1000).build();
 
 		con = new XMPPTCPConnection(config);