diff --git a/Kafka/simple.protobuf/pom.xml b/Kafka/simple.protobuf/pom.xml
index 66079b8..8857309 100644
--- a/Kafka/simple.protobuf/pom.xml
+++ b/Kafka/simple.protobuf/pom.xml
@@ -38,7 +38,7 @@
 		<dependency>
 			<groupId>ch.qos.logback</groupId>
 			<artifactId>logback-core</artifactId>
-			<version>1.5.25</version>
+			<version>1.5.34</version>
 		</dependency>
 		<dependency>
 			<groupId>org.slf4j</groupId>