diff --git a/algorithms-miscellaneous-1/pom.xml b/algorithms-miscellaneous-1/pom.xml
index 30130208f8..affa66f147 100644
--- a/algorithms-miscellaneous-1/pom.xml
+++ b/algorithms-miscellaneous-1/pom.xml
@@ -42,7 +42,7 @@
         <dependency>
             <groupId>com.github.dpaukov</groupId>
             <artifactId>combinatoricslib3</artifactId>
-            <version>3.3.0</version>
+            <version>${combinatoricslib3.version}</version>
          </dependency>
     </dependencies>
 
@@ -83,6 +83,7 @@
         <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-codec.version>1.11</commons-codec.version>
         <guava.version>27.0.1-jre</guava.version>
+        <combinatoricslib3.version>3.3.0</combinatoricslib3.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/apache-avro/pom.xml b/apache-avro/pom.xml
index 5d170f0a81..e6fb4d24ff 100644
--- a/apache-avro/pom.xml
+++ b/apache-avro/pom.xml
@@ -17,7 +17,7 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.10</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
diff --git a/core-java-modules/core-java-collections-set/pom.xml b/core-java-modules/core-java-collections-set/pom.xml
index 4435f8b151..8e2f7707f2 100644
--- a/core-java-modules/core-java-collections-set/pom.xml
+++ b/core-java-modules/core-java-collections-set/pom.xml
@@ -27,17 +27,18 @@
     <dependency>
         <groupId>com.google.code.gson</groupId>
         <artifactId>gson</artifactId>
-        <version>2.8.5</version>
+        <version>${gson.version}</version>
     </dependency>
     <dependency>
         <groupId>commons-lang</groupId>
         <artifactId>commons-lang</artifactId>
-        <version>2.6</version>
+        <version>${commons-lang.version}</version>
     </dependency>
     </dependencies>
 
     <properties>
         <commons-collections4.version>4.3</commons-collections4.version>
         <guava.version>27.1-jre</guava.version>
+        <gson.version>2.8.5</gson.version>
     </properties>
 </project>
\ No newline at end of file
diff --git a/core-java-modules/core-java-exceptions/pom.xml b/core-java-modules/core-java-exceptions/pom.xml
index 37f65882c3..7bc0aa5b4e 100644
--- a/core-java-modules/core-java-exceptions/pom.xml
+++ b/core-java-modules/core-java-exceptions/pom.xml
@@ -22,7 +22,7 @@
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
-			<version>4.12</version>
+			<version>${junit.version}</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
diff --git a/core-java-modules/multimodulemavenproject/pom.xml b/core-java-modules/multimodulemavenproject/pom.xml
index 3d56f1356b..d2fb02deb0 100644
--- a/core-java-modules/multimodulemavenproject/pom.xml
+++ b/core-java-modules/multimodulemavenproject/pom.xml
@@ -19,13 +19,13 @@
             <dependency>
                 <groupId>junit</groupId>
                 <artifactId>junit</artifactId>
-                <version>4.12</version>
+                <version>${junit.version}</version>
                 <scope>test</scope>
             </dependency>
             <dependency>
                 <groupId>org.assertj</groupId>
                 <artifactId>assertj-core</artifactId>
-                <version>3.12.2</version>
+                <version>${assertj-core.version}</version>
                 <scope>test</scope>
             </dependency>
         </dependencies>
@@ -58,5 +58,6 @@
     
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <assertj-core.version>3.12.2</assertj-core.version>
     </properties>
 </project>
diff --git a/core-java-modules/pre-jpms/pom.xml b/core-java-modules/pre-jpms/pom.xml
index 169cd21f3e..94180ac6c9 100644
--- a/core-java-modules/pre-jpms/pom.xml
+++ b/core-java-modules/pre-jpms/pom.xml
@@ -18,7 +18,7 @@
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-api</artifactId>
-			<version>1.7.25</version>
+			<version>${org.slf4j.version}</version>
 		</dependency>
 	</dependencies>
 	<build>
diff --git a/jackson-2/pom.xml b/jackson-2/pom.xml
index 6a975f1de7..2fff1f8706 100644
--- a/jackson-2/pom.xml
+++ b/jackson-2/pom.xml
@@ -26,21 +26,21 @@
         <dependency>
             <groupId>com.fasterxml.jackson.dataformat</groupId>
             <artifactId>jackson-dataformat-yaml</artifactId>
-            <version>2.9.8</version>
+            <version>${jackson.version}</version>
         </dependency>
         
         <!-- CSV -->
         <dependency>
             <groupId>com.fasterxml.jackson.dataformat</groupId>
             <artifactId>jackson-dataformat-csv</artifactId>
-            <version>2.9.8</version>
+            <version>${jackson.version}</version>
         </dependency>        
 
         <!-- Allow use of LocalDate -->
         <dependency>
             <groupId>com.fasterxml.jackson.datatype</groupId>
             <artifactId>jackson-datatype-jsr310</artifactId>
-            <version>2.9.8</version>
+            <version>${jackson.version}</version>
         </dependency>
 
 
diff --git a/java-dates-2/pom.xml b/java-dates-2/pom.xml
index 2f861ff5f4..c1419514ef 100644
--- a/java-dates-2/pom.xml
+++ b/java-dates-2/pom.xml
@@ -25,7 +25,7 @@
         <dependency>
             <groupId>commons-validator</groupId>
             <artifactId>commons-validator</artifactId>
-            <version>1.6</version>
+            <version>${commons-validator.version}</version>
         </dependency>
 
         <!-- test scoped -->
@@ -63,6 +63,7 @@
         <!-- testing -->
         <assertj.version>3.6.1</assertj.version>
         <joda-time.version>2.10</joda-time.version>
+        <commons-validator.version>1.6</commons-validator.version>
         <maven.compiler.source>1.9</maven.compiler.source>
         <maven.compiler.target>1.9</maven.compiler.target>
     </properties>
diff --git a/java-math/pom.xml b/java-math/pom.xml
index 159d053df3..f71577b707 100644
--- a/java-math/pom.xml
+++ b/java-math/pom.xml
@@ -42,7 +42,7 @@
         <dependency>
             <groupId>com.github.dpaukov</groupId>
             <artifactId>combinatoricslib3</artifactId>
-            <version>3.3.0</version>
+            <version>${combinatoricslib3.version}</version>
          </dependency>
     </dependencies>
 
@@ -63,6 +63,7 @@
         <org.assertj.core.version>3.9.0</org.assertj.core.version>
         <commons-codec.version>1.11</commons-codec.version>
         <guava.version>27.0.1-jre</guava.version>
+        <combinatoricslib3.version>3.3.0</combinatoricslib3.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/libraries-2/pom.xml b/libraries-2/pom.xml
index 7bd3f5b355..13b7ccef7b 100644
--- a/libraries-2/pom.xml
+++ b/libraries-2/pom.xml
@@ -34,7 +34,7 @@
         <dependency>
             <groupId>com.pivovarit</groupId>
             <artifactId>parallel-collectors</artifactId>
-            <version>1.1.0</version>
+            <version>${parallel-collectors.version}</version>
         </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
@@ -96,22 +96,22 @@
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>okhttp</artifactId>
-            <version>3.14.2</version>
+            <version>${okhttp.version}</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.9.9</version>
+            <version>${jackson.version}</version>
         </dependency>
         <dependency>
             <groupId>com.google.code.gson</groupId>
             <artifactId>gson</artifactId>
-            <version>2.8.5</version>
+            <version>${gson.version}</version>
         </dependency>
         <dependency>
             <groupId>com.squareup.okhttp3</groupId>
             <artifactId>mockwebserver</artifactId>
-            <version>3.14.2</version>
+            <version>${mockwebserver.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -122,7 +122,7 @@
         <dependency>
             <groupId>com.github.jknack</groupId>
             <artifactId>handlebars</artifactId>
-            <version>4.1.2</version>
+            <version>${handlebars.version}</version>
         </dependency>
         <!-- Benchmarking -->
         <dependency>
@@ -156,5 +156,10 @@
         <la4j.version>0.6.0</la4j.version>
         <jmh.version>1.19</jmh.version>
         <mesos.library.version>0.28.3</mesos.library.version>
+        <parallel-collectors.version>1.1.0</parallel-collectors.version>
+        <okhttp.version>3.14.2</okhttp.version>
+        <gson.version>2.8.5</gson.version>
+        <mockwebserver.version>3.14.2</mockwebserver.version>
+        <handlebars.version>4.1.2</handlebars.version>
     </properties>
 </project>
diff --git a/maven/versions-maven-plugin/original/pom.xml b/maven/versions-maven-plugin/original/pom.xml
index 7608e4d168..df8ee9a20e 100644
--- a/maven/versions-maven-plugin/original/pom.xml
+++ b/maven/versions-maven-plugin/original/pom.xml
@@ -11,19 +11,19 @@
         <dependency>
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
-            <version>2.3</version>
+            <version>${commons-io.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-collections4</artifactId>
-            <version>4.0</version>
+            <version>${commons-collections4.version}</version>
         </dependency>
 
         <dependency>
             <groupId>org.apache.commons</groupId>
             <artifactId>commons-lang3</artifactId>
-            <version>3.0</version>
+            <version>${commons-lang3.version}</version>
         </dependency>
 
         <dependency>
@@ -35,7 +35,7 @@
         <dependency>
             <groupId>commons-beanutils</groupId>
             <artifactId>commons-beanutils</artifactId>
-            <version>1.9.1-SNAPSHOT</version>
+            <version>${commons-beanutils.version}</version>
         </dependency>
 
     </dependencies>
@@ -71,6 +71,10 @@
 
     <properties>        
         <commons-compress-version>1.15</commons-compress-version>
+        <commons-io.version>2.3</commons-io.version>
+        <commons-collections4.version>4.0</commons-collections4.version>
+        <commons-lang3.version>3.0</commons-lang3.version>
+        <commons-beanutils.version>1.9.1</commons-beanutils.version>
     </properties>
     	
 </project>
\ No newline at end of file
diff --git a/patterns/dip/pom.xml b/patterns/dip/pom.xml
index dac3f824f2..bc793c0090 100644
--- a/patterns/dip/pom.xml
+++ b/patterns/dip/pom.xml
@@ -19,13 +19,13 @@
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
-            <version>3.12.1</version>
+            <version>${assertj-core.version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
@@ -34,6 +34,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>
+        <assertj-core.version>3.12.1</assertj-core.version>
     </properties>
 
 </project>
diff --git a/persistence-modules/elasticsearch/pom.xml b/persistence-modules/elasticsearch/pom.xml
index ceed88aa24..f7bfdb44de 100644
--- a/persistence-modules/elasticsearch/pom.xml
+++ b/persistence-modules/elasticsearch/pom.xml
@@ -20,12 +20,16 @@
         <dependency>
             <groupId>io.searchbox</groupId>
             <artifactId>jest</artifactId>
-            <version>6.3.1</version>
+            <version>${jest.version}</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
             <artifactId>jackson-databind</artifactId>
-            <version>2.9.6</version>
+            <version>${jackson.version}</version>
         </dependency>
     </dependencies>
+
+    <properties>
+        <jest.version>6.3.1</jest.version>
+    </properties>
 </project>
diff --git a/persistence-modules/hibernate-mapping/pom.xml b/persistence-modules/hibernate-mapping/pom.xml
index bb8ebdab65..6845295812 100644
--- a/persistence-modules/hibernate-mapping/pom.xml
+++ b/persistence-modules/hibernate-mapping/pom.xml
@@ -45,12 +45,12 @@
         <dependency>
             <groupId>javax.money</groupId>
             <artifactId>money-api</artifactId>
-            <version>1.0.3</version>
+            <version>${money-api.version}</version>
         </dependency>
         <dependency>
             <groupId>org.javamoney</groupId>
             <artifactId>moneta</artifactId>
-            <version>1.3</version>
+            <version>${moneta.version}</version>
             <type>pom</type>
         </dependency>
     </dependencies>
@@ -70,6 +70,8 @@
         <assertj-core.version>3.8.0</assertj-core.version>
         <hibernate-validator.version>6.0.16.Final</hibernate-validator.version>
         <org.glassfish.javax.el.version>3.0.1-b11</org.glassfish.javax.el.version>
+        <money-api.version>1.0.3</money-api.version>
+        <moneta.version>1.3</moneta.version>
     </properties>
 
 </project>
diff --git a/persistence-modules/hibernate-ogm/pom.xml b/persistence-modules/hibernate-ogm/pom.xml
index 2ccac03bd3..7ac29b1720 100644
--- a/persistence-modules/hibernate-ogm/pom.xml
+++ b/persistence-modules/hibernate-ogm/pom.xml
@@ -19,31 +19,31 @@
 		<dependency>
 			<groupId>org.hibernate.ogm</groupId>
 			<artifactId>hibernate-ogm-mongodb</artifactId>
-			<version>5.4.0.Final</version>
+			<version>${hibernate.version}</version>
 		</dependency>
 		<!-- Neo4j -->
 		<dependency>
 			<groupId>org.hibernate.ogm</groupId>
 			<artifactId>hibernate-ogm-neo4j</artifactId>
-			<version>5.4.0.Final</version>
+			<version>${hibernate.version}</version>
 		</dependency>
 		<!-- Narayana JTA -->  
 		<dependency>
 			<groupId>org.jboss.narayana.jta</groupId>
 			<artifactId>narayana-jta</artifactId>
-			<version>5.5.23.Final</version>
+			<version>${narayana-jta.version}</version>
 		</dependency>
 		<!-- Testing -->
 		<dependency>
 			<groupId>junit</groupId>
 			<artifactId>junit</artifactId>
-			<version>4.12</version>
+			<version>${junit.version}</version>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.easytesting</groupId>
 			<artifactId>fest-assert</artifactId>
-			<version>1.4</version>
+			<version>${fest-assert.version}</version>
 			<scope>test</scope>
 		</dependency>
     </dependencies>
@@ -57,4 +57,10 @@
             </resource>
         </resources>
     </build>
+
+    <properties>
+        <hibernate.version>5.4.0.Final</hibernate.version>
+        <fest-assert.version>1.4</fest-assert.version>
+        <narayana-jta.version>5.5.23.Final</narayana-jta.version>
+    </properties>
 </project>
\ No newline at end of file
diff --git a/persistence-modules/hibernate5/pom.xml b/persistence-modules/hibernate5/pom.xml
index 7a9fdc0d34..bf4b2d27ec 100644
--- a/persistence-modules/hibernate5/pom.xml
+++ b/persistence-modules/hibernate5/pom.xml
@@ -60,7 +60,7 @@
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-testing</artifactId>
-            <version>5.2.2.Final</version>
+            <version>${hibernate.version}</version>
         </dependency>
         <dependency>
             <groupId>com.fasterxml.jackson.core</groupId>
@@ -70,7 +70,7 @@
         <dependency>
             <groupId>net.bytebuddy</groupId>
             <artifactId>byte-buddy</artifactId>
-            <version>1.9.5</version>
+            <version>${byte-buddy.version}</version>
         </dependency>
 
         <dependency>
@@ -91,7 +91,7 @@
         <dependency>
             <groupId>javax.xml.bind</groupId>
             <artifactId>jaxb-api</artifactId>
-            <version>2.3.0</version>
+            <version>${jaxb-api.version}</version>
         </dependency>
     </dependencies>
 
@@ -120,6 +120,8 @@
         <assertj-core.version>3.8.0</assertj-core.version>
         <openjdk-jmh.version>1.21</openjdk-jmh.version>
         <geodb.version>0.9</geodb.version>
+        <byte-buddy.version>1.9.5</byte-buddy.version>
+        <jaxb-api.version>2.3.0</jaxb-api.version>
     </properties>
 
 </project>
diff --git a/persistence-modules/java-jpa/pom.xml b/persistence-modules/java-jpa/pom.xml
index 51cc401332..978679cfe6 100644
--- a/persistence-modules/java-jpa/pom.xml
+++ b/persistence-modules/java-jpa/pom.xml
@@ -34,7 +34,7 @@
         <dependency>
             <groupId>javax.persistence</groupId>
             <artifactId>javax.persistence-api</artifactId>
-            <version>2.2</version>
+            <version>${javax.persistence-api.version}</version>
         </dependency>
 
         <!--Runtime JPA implementation-->
@@ -108,6 +108,7 @@
         <hibernate.version>5.4.0.Final</hibernate.version>
         <eclipselink.version>2.7.4-RC1</eclipselink.version>
         <postgres.version>42.2.5</postgres.version>
+        <javax.persistence-api.version>2.2</javax.persistence-api.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/persistence-modules/spring-data-jpa-2/pom.xml b/persistence-modules/spring-data-jpa-2/pom.xml
index fbc19810ef..08be64670b 100644
--- a/persistence-modules/spring-data-jpa-2/pom.xml
+++ b/persistence-modules/spring-data-jpa-2/pom.xml
@@ -29,7 +29,7 @@
         <dependency>
             <groupId>net.ttddyy</groupId>
             <artifactId>datasource-proxy</artifactId>
-            <version>1.4.1</version>
+            <version>${datasource-proxy.version}</version>
         </dependency>
 
         <dependency>
@@ -42,4 +42,8 @@
             <artifactId>spring-oxm</artifactId>
         </dependency>
     </dependencies>
+	
+    <properties>
+        <datasource-proxy.version>1.4.1</datasource-proxy.version>
+    </properties>
 </project>
\ No newline at end of file
diff --git a/persistence-modules/spring-data-jpa/pom.xml b/persistence-modules/spring-data-jpa/pom.xml
index a7788065c9..af92f331d1 100644
--- a/persistence-modules/spring-data-jpa/pom.xml
+++ b/persistence-modules/spring-data-jpa/pom.xml
@@ -37,14 +37,14 @@
         <dependency>
             <groupId>org.testcontainers</groupId>
             <artifactId>postgresql</artifactId>
-            <version>1.10.6</version>
+            <version>${testcontainers.postgresql.version}</version>
             <scope>test</scope>
         </dependency>
 
         <dependency>
             <groupId>org.postgresql</groupId>
             <artifactId>postgresql</artifactId>
-            <version>42.2.5</version>
+            <version>${postgresql.version}</version>
         </dependency>
         <!-- Test containers only dependencies -->
 
@@ -66,7 +66,7 @@
         <dependency>
             <groupId>com.google.guava</groupId>
             <artifactId>guava</artifactId>
-            <version>21.0</version>
+            <version>${guava.version}</version>
         </dependency>
         
         <!-- JUnit Jupiter dependencies -->
@@ -92,6 +92,9 @@
     
     <properties>
     	<start-class>com.baeldung.boot.Application</start-class>
+    	<testcontainers.postgresql.version>1.10.6</testcontainers.postgresql.version>
+    	<postgresql.version>42.2.5</postgresql.version>
+    	<guava.version>21.0</guava.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index d67622feb7..f3ddb5d17b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -1552,6 +1552,7 @@
 		<exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
 		<maven-failsafe-plugin.version>2.21.0</maven-failsafe-plugin.version>
 		<commons-io.version>2.5</commons-io.version>
+		<commons-lang.version>2.6</commons-lang.version>
 		<commons-cli.version>1.4</commons-cli.version>
 		<maven-war-plugin.version>3.0.0</maven-war-plugin.version>
 		<javax.servlet-api.version>3.1.0</javax.servlet-api.version>
diff --git a/spring-boot-mvc/pom.xml b/spring-boot-mvc/pom.xml
index e17c1d39b9..fee725847f 100644
--- a/spring-boot-mvc/pom.xml
+++ b/spring-boot-mvc/pom.xml
@@ -40,7 +40,7 @@
         <dependency>
             <groupId>org.glassfish</groupId>
             <artifactId>javax.faces</artifactId>
-            <version>2.3.7</version>
+            <version>${javax.faces.version}</version>
         </dependency>
 
         <!--Test -->
@@ -108,6 +108,7 @@
         <spring.fox.version>2.9.2</spring.fox.version>
         <!-- ROME for RSS -->
         <rome.version>1.10.0</rome.version>
+        <javax.faces.version>2.3.7</javax.faces.version>
         <start-class>com.baeldung.springbootmvc.SpringBootMvcApplication</start-class>
     </properties>
 
diff --git a/spring-cloud/spring-cloud-functions/pom.xml b/spring-cloud/spring-cloud-functions/pom.xml
index 7a44e4ae0f..82147cea28 100644
--- a/spring-cloud/spring-cloud-functions/pom.xml
+++ b/spring-cloud/spring-cloud-functions/pom.xml
@@ -29,7 +29,7 @@
          <dependency>
             <groupId>org.springframework.cloud</groupId>
             <artifactId>spring-cloud-starter-function-web</artifactId>
-            <version>1.0.1.RELEASE</version>
+            <version>${spring-cloud-function.version}</version>
         </dependency>
         <dependency>
             <groupId>com.amazonaws</groupId>
@@ -40,7 +40,7 @@
         <dependency>
             <groupId>com.amazonaws</groupId>
             <artifactId>aws-lambda-java-core</artifactId>
-            <version>1.1.0</version>
+            <version>${aws-lambda-java-core.version}</version>
             <scope>provided</scope>
         </dependency>
         <dependency>
@@ -87,6 +87,7 @@
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <spring-cloud-function.version>1.0.1.RELEASE</spring-cloud-function.version>
         <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>
     </properties>
 
diff --git a/spring-mvc-xml/pom.xml b/spring-mvc-xml/pom.xml
index 46af321d1b..c978bdd983 100644
--- a/spring-mvc-xml/pom.xml
+++ b/spring-mvc-xml/pom.xml
@@ -82,7 +82,7 @@
         <dependency>
             <groupId>org.glassfish</groupId>
             <artifactId>javax.el</artifactId>
-            <version>3.0.1-b08</version>
+            <version>${javax.el.version}</version>
         </dependency>
 
         <dependency>
@@ -131,12 +131,11 @@
         <hibernate-validator.version>6.0.10.Final</hibernate-validator.version>
         <jstl.version>1.2</jstl.version>
         <javax.servlet.version>3.1.0</javax.servlet.version>
-        <jackson.version>2.9.6</jackson.version>
+        <javax.el.version>3.0.1-b08</javax.el.version>
 
         <!-- util -->
         <guava.version>19.0</guava.version>
         <commons-lang3.version>3.5</commons-lang3.version>
-        <commons-io.version>2.5</commons-io.version>
         <geoip2.version>2.8.0</geoip2.version>
 
         <!-- Maven plugins -->
diff --git a/testing-modules/mockito/pom.xml b/testing-modules/mockito/pom.xml
index acdd7eb2ac..19dbaa0dc1 100644
--- a/testing-modules/mockito/pom.xml
+++ b/testing-modules/mockito/pom.xml
@@ -33,7 +33,7 @@
         <dependency>
             <groupId>org.eclipse.persistence</groupId>
             <artifactId>javax.persistence</artifactId>
-            <version>2.1.1</version>
+            <version>${javax.persistence.version}</version>
         </dependency>
 
         <!-- utils -->
@@ -99,6 +99,7 @@
         <!-- testing -->
         <powermock.version>1.7.0</powermock.version>
         <hamcrest.version>2.0.0.0</hamcrest.version>
+        <javax.persistence.version>2.1.1</javax.persistence.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/testing-modules/spring-testing/pom.xml b/testing-modules/spring-testing/pom.xml
index 0eca9b6a7e..f4d7b5dc66 100644
--- a/testing-modules/spring-testing/pom.xml
+++ b/testing-modules/spring-testing/pom.xml
@@ -51,7 +51,7 @@
         <dependency>
             <groupId>org.eclipse.persistence</groupId>
             <artifactId>javax.persistence</artifactId>
-            <version>2.1.1</version>
+            <version>${javax.persistence.version}</version>
         </dependency>
         <dependency>
             <groupId>org.springframework.data</groupId>
@@ -95,6 +95,7 @@
         <junit.jupiter.version>5.4.0</junit.jupiter.version>
         <spring.version>5.1.4.RELEASE</spring.version>
         <servlet.api.version>4.0.1</servlet.api.version>
+        <javax.persistence.version>2.1.1</javax.persistence.version>
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/xml/pom.xml b/xml/pom.xml
index ba6a734dc9..e9b89c71fc 100644
--- a/xml/pom.xml
+++ b/xml/pom.xml
@@ -33,17 +33,17 @@
         <dependency>
             <groupId>javax.xml</groupId>
             <artifactId>jaxb-api</artifactId>
-            <version>2.1</version>
+            <version>${jaxb-api.version}</version>
         </dependency>
         <dependency>
             <groupId>javax.xml</groupId>
             <artifactId>jaxp-api</artifactId>
-            <version>1.4.2</version>
+            <version>${jaxp-api.version}</version>
         </dependency>
         <dependency>
             <groupId>javax.xml.stream</groupId>
             <artifactId>stax-api</artifactId>
-            <version>1.0-2</version>
+            <version>${stax-api.version}</version>
         </dependency>
 
         <!-- utils -->
@@ -252,6 +252,9 @@
         <commons-io.version>2.5</commons-io.version>
         <commons-collections4.version>4.1</commons-collections4.version>
         <jibx-version>1.2.4.5</jibx-version>
+        <jaxb-api.version>2.1</jaxb-api.version>
+        <jaxp-api.version>1.4.2</jaxp-api.version>
+        <stax-api.version>1.0-2</stax-api.version>
 
         <!-- util -->
         <commons-lang3.version>3.5</commons-lang3.version>