diff --git a/java-component/chapter4_4_mongodb_aggregation/pom.xml b/java-component/chapter4_4_mongodb_aggregation/pom.xml
old mode 100755
new mode 100644
index 285fb33..4760d40
--- a/java-component/chapter4_4_mongodb_aggregation/pom.xml
+++ b/java-component/chapter4_4_mongodb_aggregation/pom.xml
@@ -16,7 +16,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <junit.version>4.12</junit.version>
-        <spring.version>4.3.3.RELEASE</spring.version>
+        <spring.version>5.2.20.RELEASE</spring.version>
     </properties>
 
     <dependencies>