diff --git a/spring-boot-data/pom.xml b/spring-boot-data/pom.xml
index 663ee640f3..f9e51920c2 100644
--- a/spring-boot-data/pom.xml
+++ b/spring-boot-data/pom.xml
@@ -97,8 +97,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>8</source>
-                    <target>8</target>
+                    <source>${source.version}</source>
+                    <target>${target.version}</target>
                 </configuration>
             </plugin>
         </plugins>
@@ -121,8 +121,8 @@
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-compiler-plugin</artifactId>
                         <configuration>
-                            <source>8</source>
-                            <target>8</target>
+                            <source>${source.version}</source>
+                            <target>${target.version}</target>
                         </configuration>
                     </plugin>
                     <plugin>
@@ -156,8 +156,8 @@
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-compiler-plugin</artifactId>
                         <configuration>
-                            <source>1.8</source>
-                            <target>1.8</target>
+                            <source>${source.version}</source>
+                            <target>${target.version}</target>
                         </configuration>
                     </plugin>
                 </plugins>
@@ -168,6 +168,8 @@
     <properties>
         <javers.version>5.6.3</javers.version>
         <git-commit-id-plugin.version>2.2.4</git-commit-id-plugin.version>
+        <source.version>1.8</source.version>
+        <target.version>1.8</target.version>
     </properties>
     
 </project>
diff --git a/spring-boot-parent/spring-boot-with-starter-parent/pom.xml b/spring-boot-parent/spring-boot-with-starter-parent/pom.xml
index 9ea26e49fe..ed2cb8646c 100644
--- a/spring-boot-parent/spring-boot-with-starter-parent/pom.xml
+++ b/spring-boot-parent/spring-boot-with-starter-parent/pom.xml
@@ -20,7 +20,7 @@
             <dependency>
                 <groupId>org.springframework.boot</groupId>
                 <artifactId>spring-boot-starter-data-jpa</artifactId>
-                <version>2.1.1.RELEASE</version>
+                <version>${spring-boot.version}</version>
             </dependency>
         </dependencies>
     </dependencyManagement>
@@ -38,6 +38,7 @@
 
     <properties>
         <java.version>1.8</java.version>
+        <spring-boot.version>2.1.1.RELEASE</spring-boot.version>
         <junit.version>4.11</junit.version>
     </properties>
 
diff --git a/spring-boot-property-exp/property-exp-custom-config/pom.xml b/spring-boot-property-exp/property-exp-custom-config/pom.xml
index f9c3d6ef62..0118de7396 100644
--- a/spring-boot-property-exp/property-exp-custom-config/pom.xml
+++ b/spring-boot-property-exp/property-exp-custom-config/pom.xml
@@ -52,7 +52,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-resources-plugin</artifactId>
-                <version>2.7</version>
+                <version>${apache-maven.version}</version>
                 <configuration>
                     <delimiters>
                         <delimiter>@</delimiter>
@@ -63,7 +63,7 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>exec-maven-plugin</artifactId>
-                <version>1.6.0</version>
+                <version>${exec-maven-plugin.version}</version>
                 <configuration>
                     <mainClass>com.baeldung.propertyexpansion.SpringBootPropertyExpansionApp</mainClass>
                 </configuration>
@@ -74,6 +74,8 @@
     <properties>
         <spring-boot.version>1.5.10.RELEASE</spring-boot.version>
         <custom.property>Custom Property Value</custom.property>
+        <apache-maven.version>2.7</apache-maven.version>
+        <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
     </properties>
 
 </project>
diff --git a/spring-boot-testing/pom.xml b/spring-boot-testing/pom.xml
index ebe87fdd70..5f358072d3 100644
--- a/spring-boot-testing/pom.xml
+++ b/spring-boot-testing/pom.xml
@@ -42,7 +42,7 @@
         <dependency>
             <groupId>it.ozimov</groupId>
             <artifactId>embedded-redis</artifactId>
-            <version>0.7.2</version>
+            <version>${redis.version}</version>
             <scope>test</scope>
         </dependency>
         <!-- Spock & Spring -->
@@ -131,6 +131,7 @@
         <git-commit-id-plugin.version>2.2.4</git-commit-id-plugin.version>
         <spock.version>1.2-groovy-2.4</spock.version>
         <gmavenplus-plugin.version>1.6</gmavenplus-plugin.version>
+        <redis.version>0.7.2</redis.version>
     </properties>
 
 </project>
diff --git a/spring-cloud/spring-cloud-aws/pom.xml b/spring-cloud/spring-cloud-aws/pom.xml
index c1fc458a24..abf9363288 100644
--- a/spring-cloud/spring-cloud-aws/pom.xml
+++ b/spring-cloud/spring-cloud-aws/pom.xml
@@ -50,7 +50,7 @@
             <dependency>
                 <groupId>org.springframework.cloud</groupId>
                 <artifactId>spring-cloud-aws</artifactId>
-                <version>2.0.1.RELEASE</version>
+                <version>${spring-cloud}</version>
                 <type>pom</type>
                 <scope>import</scope>
             </dependency>
@@ -60,6 +60,7 @@
     <properties>
         <start-class>com.baeldung.spring.cloud.aws.SpringCloudAwsApplication</start-class>
         <spring-cloud.version>Dalston.SR4</spring-cloud.version>
+        <spring-cloud>2.0.1.RELEASE</spring-cloud>
     </properties>
     
 </project>
diff --git a/spring-cloud/spring-cloud-contract/spring-cloud-contract-producer/pom.xml b/spring-cloud/spring-cloud-contract/spring-cloud-contract-producer/pom.xml
index c41ad687ed..e909dbc253 100644
--- a/spring-cloud/spring-cloud-contract/spring-cloud-contract-producer/pom.xml
+++ b/spring-cloud/spring-cloud-contract/spring-cloud-contract-producer/pom.xml
@@ -36,7 +36,7 @@
             <plugin>
                 <groupId>org.springframework.cloud</groupId>
                 <artifactId>spring-cloud-contract-maven-plugin</artifactId>
-                <version>2.1.1.RELEASE</version>
+                <version>${spring-cloud.version}</version>
                 <extensions>true</extensions>
                 <configuration>
                     <baseClassForTests>com.baeldung.spring.cloud.springcloudcontractproducer.BaseTestClass
@@ -45,4 +45,8 @@
             </plugin>
         </plugins>
     </build>
+
+    <properties>
+        <spring-cloud.version>2.1.1.RELEASE</spring-cloud.version>
+    </properties>
 </project>
diff --git a/spring-cloud/spring-cloud-functions/pom.xml b/spring-cloud/spring-cloud-functions/pom.xml
index 2e1b747c2e..03510d0504 100644
--- a/spring-cloud/spring-cloud-functions/pom.xml
+++ b/spring-cloud/spring-cloud-functions/pom.xml
@@ -65,7 +65,7 @@
                     <dependency>
                         <groupId>org.springframework.boot.experimental</groupId>
                         <artifactId>spring-boot-thin-layout</artifactId>
-                        <version>1.0.10.RELEASE</version>
+                        <version>${spring-boot-thin.version}</version>
                     </dependency>
                 </dependencies>
             </plugin>
@@ -88,6 +88,7 @@
         <aws-lambda-events.version>2.0.2</aws-lambda-events.version>
         <aws-lambda-java-core.version>1.1.0</aws-lambda-java-core.version>
         <spring-boot.version>2.0.4.RELEASE</spring-boot.version>
+        <spring-boot-thin.version>1.0.10.RELEASE</spring-boot-thin.version>
     </properties>
 
 </project>
diff --git a/spring-cloud/spring-cloud-kubernetes/kubernetes-guide/travel-agency-service/pom.xml b/spring-cloud/spring-cloud-kubernetes/kubernetes-guide/travel-agency-service/pom.xml
index 93734a19a7..5459b77682 100644
--- a/spring-cloud/spring-cloud-kubernetes/kubernetes-guide/travel-agency-service/pom.xml
+++ b/spring-cloud/spring-cloud-kubernetes/kubernetes-guide/travel-agency-service/pom.xml
@@ -24,7 +24,7 @@
             <dependency>
                 <groupId>ch.qos.logback</groupId>
                 <artifactId>logback-classic</artifactId>
-                <version>1.2.3</version>
+                <version>${logback.version}</version>
             </dependency>
         </dependencies>
     </dependencyManagement>
@@ -71,6 +71,7 @@
 
     <properties>
         <spring-cloud-dependencies.version>Finchley.SR2</spring-cloud-dependencies.version>
+        <logback.version>1.2.3</logback.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/spring-core-2/pom.xml b/spring-core-2/pom.xml
index 12b6972a79..78b94880d0 100644
--- a/spring-core-2/pom.xml
+++ b/spring-core-2/pom.xml
@@ -174,7 +174,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-war-plugin</artifactId>
-                <version>3.2.2</version>
+                <version>${maven.version}</version>
                 <configuration>
                     <failOnMissingWebXml>false</failOnMissingWebXml>
                 </configuration>
@@ -214,6 +214,7 @@
         <assertj.version>3.6.1</assertj.version>
         <shedlock.version>2.1.0</shedlock.version>
         <javassist.version>3.22.0-GA</javassist.version>
+        <maven.version>3.2.2</maven.version>
     </properties>
 
 </project>
diff --git a/spring-data-rest-querydsl/pom.xml b/spring-data-rest-querydsl/pom.xml
index 9f53f6b55f..c0ad43fe0b 100644
--- a/spring-data-rest-querydsl/pom.xml
+++ b/spring-data-rest-querydsl/pom.xml
@@ -72,8 +72,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <source>${maven.source}</source>
+                    <target>${maven.target}</target>
                     <compilerArgs>
                         <arg>-verbose</arg>
                         <arg>-parameters</arg>
@@ -83,7 +83,7 @@
             <plugin>
                 <groupId>com.mysema.maven</groupId>
                 <artifactId>apt-maven-plugin</artifactId>
-                <version>1.1.3</version>
+                <version>${mysema.version}</version>
                 <executions>
                     <execution>
                         <phase>generate-sources</phase>
@@ -99,5 +99,10 @@
             </plugin>
         </plugins>
     </build>
+    <properties>
+        <maven.source>1.8</maven.source>
+        <maven.target>1.8</maven.target>
+        <mysema.version>1.1.3</mysema.version>
+    </properties>
 
 </project>
diff --git a/spring-data-rest/pom.xml b/spring-data-rest/pom.xml
index 05f2ccbbae..bb592c08d5 100644
--- a/spring-data-rest/pom.xml
+++ b/spring-data-rest/pom.xml
@@ -66,7 +66,7 @@
             <plugin>
                 <groupId>com.mysema.maven</groupId>
                 <artifactId>maven-apt-plugin</artifactId>
-                <version>1.0</version>
+                <version>${maven.version}</version>
                 <executions>
                     <execution>
                         <phase>generate-sources</phase>
@@ -90,6 +90,7 @@
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <start-class>com.baeldung.books.SpringDataRestApplication</start-class>
+        <maven.version>1.0</maven.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/spring-ejb/wildfly/wildfly-ear/pom.xml b/spring-ejb/wildfly/wildfly-ear/pom.xml
index 9393820b12..07f53358bf 100644
--- a/spring-ejb/wildfly/wildfly-ear/pom.xml
+++ b/spring-ejb/wildfly/wildfly-ear/pom.xml
@@ -45,7 +45,7 @@
                 <version>${maven-ear-plugin.version}</version>
                 <configuration>
                     <defaultLibBundleDir>lib/</defaultLibBundleDir>
-                    <version>7</version>
+                    <version>${defaultLibBundleDir.version}</version>
                     <modules>
                         <webModule>
                             <groupId>com.baeldung.wildfly</groupId>
@@ -66,6 +66,7 @@
     <properties>
         <maven-ear-plugin.version>2.10.1</maven-ear-plugin.version>
         <wildfly-maven-plugin.version>1.2.0.Final</wildfly-maven-plugin.version>
+        <defaultLibBundleDir.version>7</defaultLibBundleDir.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/spring-integration/pom.xml b/spring-integration/pom.xml
index ebdde5a1ee..a985f55d89 100644
--- a/spring-integration/pom.xml
+++ b/spring-integration/pom.xml
@@ -85,7 +85,7 @@
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
-            <version>1.4.197</version>
+            <version>${h2.version}</version>
         </dependency>
     </dependencies>
 
@@ -124,6 +124,7 @@
         <javax-activation.version>1.1.1</javax-activation.version>
         <maven-eclipse-plugin.version>2.10</maven-eclipse-plugin.version>
         <exec-maven-plugin.version>1.5.0</exec-maven-plugin.version>
+        <h2.version>1.4.197</h2.version>
     </properties>
 
 </project>
diff --git a/spring-jms/pom.xml b/spring-jms/pom.xml
index a0d2625477..9cd9126fac 100644
--- a/spring-jms/pom.xml
+++ b/spring-jms/pom.xml
@@ -38,7 +38,7 @@
         <dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
-			<version>1.5.10.RELEASE</version>
+			<version>${spring-boot-test.version}</version>
 			<scope>test</scope>
 		</dependency>
     </dependencies>
@@ -64,6 +64,7 @@
     <properties>
         <springframework.version>4.3.4.RELEASE</springframework.version>
         <activemq.version>5.14.1</activemq.version>
+        <spring-boot-test.version>1.5.10.RELEASE</spring-boot-test.version>
     </properties>
 
 </project>
diff --git a/spring-mvc-java/pom.xml b/spring-mvc-java/pom.xml
index 7d0afd85ec..dd197bbeb5 100644
--- a/spring-mvc-java/pom.xml
+++ b/spring-mvc-java/pom.xml
@@ -26,12 +26,12 @@
         <dependency>
             <groupId>javax.servlet</groupId>
             <artifactId>javax.servlet-api</artifactId>
-            <version>4.0.1</version>
+            <version>${javax.version}</version>
         </dependency>
         <dependency>
             <groupId>javax.servlet.jsp</groupId>
             <artifactId>javax.servlet.jsp-api</artifactId>
-            <version>2.3.3</version>
+            <version>${javax-servlet-api.version}</version>
         </dependency>
         <dependency>
             <groupId>javax.servlet</groupId>
@@ -53,19 +53,19 @@
         <dependency>
             <groupId>org.aspectj</groupId>
             <artifactId>aspectjrt</artifactId>
-            <version>1.9.1</version>
+            <version>${aspectjrt.version}</version>
         </dependency>
         <dependency>
             <groupId>org.aspectj</groupId>
             <artifactId>aspectjweaver</artifactId>
-            <version>1.9.1</version>
+            <version>${aspectjweaver.version}</version>
         </dependency>
 
         <!-- common -->
         <dependency>
             <groupId>net.sourceforge.htmlunit</groupId>
             <artifactId>htmlunit</artifactId>
-            <version>2.32</version>
+            <version>${htmlunit.version}</version>
             <exclusions>
                 <exclusion>
                     <artifactId>commons-logging</artifactId>
@@ -99,7 +99,7 @@
             <groupId>com.jayway.jsonpath</groupId>
             <artifactId>json-path</artifactId>
             <scope>test</scope>
-            <version>2.4.0</version>
+            <version>${json-path.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -126,7 +126,7 @@
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.5</version>
+            <version>${gson.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
@@ -283,6 +283,13 @@
         <poi.version>3.16-beta1</poi.version>
 
         <javax.el.version>3.0.1-b09</javax.el.version>
+        <javax.version>4.0.1</javax.version>
+        <javax-servlet-api.version>2.3.3</javax-servlet-api.version>
+        <aspectjrt.version>1.9.1</aspectjrt.version>
+        <aspectjweaver.version>1.9.1</aspectjweaver.version>
+        <htmlunit.version>2.32</htmlunit.version>
+        <json-path.version>2.4.0</json-path.version>
+        <gson.version>2.8.5</gson.version>
         <start-class>com.baeldung.SpringMVCApplication</start-class>
     </properties>
 
diff --git a/spring-remoting/remoting-hessian-burlap/remoting-hessian-burlap-client/pom.xml b/spring-remoting/remoting-hessian-burlap/remoting-hessian-burlap-client/pom.xml
index 1f6181a365..20680d5880 100644
--- a/spring-remoting/remoting-hessian-burlap/remoting-hessian-burlap-client/pom.xml
+++ b/spring-remoting/remoting-hessian-burlap/remoting-hessian-burlap-client/pom.xml
@@ -31,7 +31,7 @@
         <dependency>
             <groupId>com.caucho</groupId>
             <artifactId>hessian</artifactId>
-            <version>4.0.38</version>
+            <version>${hessian.version}</version>
         </dependency>
 
         <!-- test -->
@@ -58,5 +58,8 @@
         </dependency>
         <!-- test -->
     </dependencies>
+    <properties>
+        <hessian.version>4.0.38</hessian.version>
+    </properties>
 
 </project>
\ No newline at end of file
diff --git a/spring-rest-hal-browser/pom.xml b/spring-rest-hal-browser/pom.xml
index 94ce837b27..adef8bf2b0 100644
--- a/spring-rest-hal-browser/pom.xml
+++ b/spring-rest-hal-browser/pom.xml
@@ -19,25 +19,25 @@
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-web</artifactId>
-            <version>2.0.3.RELEASE</version>
+            <version>${spring-boot.version}</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-data-jpa -->
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa</artifactId>
-            <version>2.0.3.RELEASE</version>
+            <version>${spring-boot.version}</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/org.springframework.data/spring-data-rest-hal-browser -->
         <dependency>
             <groupId>org.springframework.data</groupId>
             <artifactId>spring-data-rest-hal-browser</artifactId>
-            <version>3.0.8.RELEASE</version>
+            <version>${spring-data.version}</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/com.h2database/h2 -->
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
-            <version>1.4.197</version>
+            <version>${h2.version}</version>
         </dependency>
     </dependencies>
 
@@ -47,11 +47,19 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <source>${source.version}</source>
+                    <target>${target.version}</target>
                 </configuration>
             </plugin>
         </plugins>
     </build>
 
+    <properties>
+        <spring-boot.version>2.0.3.RELEASE</spring-boot.version>
+        <spring-data.version>3.0.8.RELEASE</spring-data.version>
+        <h2.version>1.4.197</h2.version>
+        <source.version>1.8</source.version>
+        <target.version>1.8</target.version>
+    </properties>
+
 </project>
\ No newline at end of file
diff --git a/spring-resttemplate/pom.xml b/spring-resttemplate/pom.xml
index 0b5d0b20d0..138fde3b45 100644
--- a/spring-resttemplate/pom.xml
+++ b/spring-resttemplate/pom.xml
@@ -125,7 +125,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>${junit.version}</version>
         </dependency>
 
         <dependency>
@@ -162,10 +162,10 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.7.0</version>
+                <version>${maven.version}</version>
                 <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
+                    <source>${source.version}</source>
+                    <target>${target.version}</target>
                 </configuration>
             </plugin>
             <plugin>
@@ -308,6 +308,10 @@
         <!-- okhttp -->
         <com.squareup.okhttp3.version>3.4.1</com.squareup.okhttp3.version>
         <pact.version>3.5.11</pact.version>
+        <source.version>1.8</source.version>
+        <target.version>1.8</target.version>
+        <junit.version>4.12</junit.version>
+        <maven.version>3.7.0</maven.version>
     </properties>
 
 </project>