log4j2 version 2.16.0

pom.xml

@@ -22,6 +22,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
+        <log4j2.version>2.16.0</log4j2.version>
     </properties>
 
     <dependencies>
@@ -53,22 +54,22 @@
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-slf4j-impl</artifactId>
-            <version>2.15.0</version>
+            <version>${log4j2.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-api</artifactId>
-            <version>2.15.0</version>
+            <version>${log4j2.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-core</artifactId>
-            <version>2.15.0</version>
+            <version>${log4j2.version}</version>
         </dependency>
         <dependency>
             <groupId>org.apache.logging.log4j</groupId>
             <artifactId>log4j-to-slf4j</artifactId>
-            <version>2.15.0</version>
+            <version>${log4j2.version}</version>
         </dependency>
 
         <dependency>