diff --git a/Lesson4.FirstIoCApp/pom.xml b/Lesson4.FirstIoCApp/pom.xml
old mode 100755
new mode 100644
index 99ea00b..40ca07d
--- a/Lesson4.FirstIoCApp/pom.xml
+++ b/Lesson4.FirstIoCApp/pom.xml
@@ -30,7 +30,7 @@
     <dependency>
       <groupId>org.springframework</groupId>
       <artifactId>spring-core</artifactId>
-      <version>5.1.4.RELEASE</version>
+      <version>5.3.19</version>
     </dependency>
 
     <!-- https://mvnrepository.com/artifact/org.springframework/spring-beans -->