diff --git a/helloworlds/1.1-common-frameworks-and-lib/spring/pom.xml b/helloworlds/1.1-common-frameworks-and-lib/spring/pom.xml
index a03f010..e80d19c 100644
--- a/helloworlds/1.1-common-frameworks-and-lib/spring/pom.xml
+++ b/helloworlds/1.1-common-frameworks-and-lib/spring/pom.xml
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <packaging>pom</packaging>
 
@@ -27,7 +26,7 @@
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-context</artifactId>
-                <version>5.3.6</version>
+                <version>5.2.21</version>
             </dependency>
 
             <dependency>
diff --git a/helloworlds/1.6-usefull-libraries/dependency_injection/dependency-injection-dagger/pom.xml b/helloworlds/1.6-usefull-libraries/dependency_injection/dependency-injection-dagger/pom.xml
index 84d69cc..676a9d1 100644
--- a/helloworlds/1.6-usefull-libraries/dependency_injection/dependency-injection-dagger/pom.xml
+++ b/helloworlds/1.6-usefull-libraries/dependency_injection/dependency-injection-dagger/pom.xml
@@ -1,7 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0"
-         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>com.github.vedenin</groupId>
@@ -43,7 +41,7 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
-            <version>4.2.2.RELEASE</version>
+            <version>5.2.21</version>
         </dependency>
 
         <dependency>
@@ -86,4 +84,4 @@
 
     </dependencies>
 
-</project>
+</project>
\ No newline at end of file
diff --git a/helloworlds/1.6-usefull-libraries/dependency_injection/dependency-injection-spring/pom.xml b/helloworlds/1.6-usefull-libraries/dependency_injection/dependency-injection-spring/pom.xml
index c0a976c..2489498 100644
--- a/helloworlds/1.6-usefull-libraries/dependency_injection/dependency-injection-spring/pom.xml
+++ b/helloworlds/1.6-usefull-libraries/dependency_injection/dependency-injection-spring/pom.xml
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <packaging>pom</packaging>
 
@@ -27,7 +26,7 @@
             <dependency>
                 <groupId>org.springframework</groupId>
                 <artifactId>spring-context</artifactId>
-                <version>4.2.2.RELEASE</version>
+                <version>5.2.21</version>
             </dependency>
 
             <dependency>
diff --git a/helloworlds/5.0-other-examples/pom.xml b/helloworlds/5.0-other-examples/pom.xml
index e052c59..a097a5a 100644
--- a/helloworlds/5.0-other-examples/pom.xml
+++ b/helloworlds/5.0-other-examples/pom.xml
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.github.vedenin</groupId>
     <artifactId>5.0-other-examples</artifactId>
@@ -78,7 +77,7 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-context</artifactId>
-            <version>4.2.4.RELEASE</version>
+            <version>5.2.21</version>
         </dependency>
     </dependencies>
 
@@ -114,8 +113,7 @@
                         <configuration>
                             <finalName>${uberjar.name}</finalName>
                             <transformers>
-                                <transformer
-                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                     <mainClass>org.openjdk.jmh.Main</mainClass>
                                 </transformer>
                             </transformers>
@@ -180,4 +178,4 @@
         </pluginManagement>
     </build>
 
-</project>
+</project>
\ No newline at end of file