diff --git a/Chapter9-2-1/consumer/pom.xml b/Chapter9-2-1/consumer/pom.xml
index 7b35a9d..8d9a366 100644
--- a/Chapter9-2-1/consumer/pom.xml
+++ b/Chapter9-2-1/consumer/pom.xml
@@ -50,7 +50,7 @@
 		<dependency>
 			<groupId>org.apache.zookeeper</groupId>
 			<artifactId>zookeeper</artifactId>
-			<version>3.4.6</version>
+			<version>3.4.14</version>
 			<exclusions>
 				<exclusion>
 					<groupId>org.slf4j</groupId>