diff --git a/simple-rpc/pom.xml b/simple-rpc/pom.xml
index 6c938ef..276a64c 100644
--- a/simple-rpc/pom.xml
+++ b/simple-rpc/pom.xml
@@ -18,7 +18,7 @@
         <log4j.version>1.2.17</log4j.version>
         <log4j2.version>2.10.0</log4j2.version>
         <commons-logging.version>1.2</commons-logging.version>
-        <jackson.version>2.9.1</jackson.version>
+        <jackson.version>2.9.10.8</jackson.version>
         <lombok.version>1.18.0</lombok.version>
         <javaassist.version>3.25.0-GA</javaassist.version>
     </properties>