diff --git a/chapter4/pom.xml b/chapter4/pom.xml
index 1f04ef8..b83651d 100644
--- a/chapter4/pom.xml
+++ b/chapter4/pom.xml
@@ -37,7 +37,7 @@
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.10.0.pr1</version>
+            <version>2.12.7.1</version>
         </dependency>
         <!--测试-->
         <dependency>