diff --git a/2.RealWorldExample/pom.xml b/2.RealWorldExample/pom.xml
old mode 100755
new mode 100644
index d9c7f92..ccc9321
--- a/2.RealWorldExample/pom.xml
+++ b/2.RealWorldExample/pom.xml
@@ -10,7 +10,7 @@
 	<description>This pom acts as the parent pom for the entire project.</description>
 
 	<properties>
-		<spring-core-version>4.1.6.RELEASE</spring-core-version>
+		<spring-core-version>5.2.20.RELEASE</spring-core-version>
 		<spring-aop-version>4.1.6.RELEASE</spring-aop-version>
 	</properties>