diff --git a/mqtt-proxy/src/main/java/io/streamnative/pulsar/handlers/mqtt/proxy/authentication/mtls/AuthenticationProviderMTls.java b/mqtt-proxy/src/main/java/io/streamnative/pulsar/handlers/mqtt/proxy/authentication/mtls/AuthenticationProviderMTls.java
index ac3e4bce..51a4e0c0 100644
--- a/mqtt-proxy/src/main/java/io/streamnative/pulsar/handlers/mqtt/proxy/authentication/mtls/AuthenticationProviderMTls.java
+++ b/mqtt-proxy/src/main/java/io/streamnative/pulsar/handlers/mqtt/proxy/authentication/mtls/AuthenticationProviderMTls.java
@@ -13,7 +13,6 @@
  */
 package io.streamnative.pulsar.handlers.mqtt.proxy.authentication.mtls;
 
-import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Joiner;