diff --git a/REST_XSLT/pom.xml b/REST_XSLT/pom.xml
index 4009c56..546cf7f 100644
--- a/REST_XSLT/pom.xml
+++ b/REST_XSLT/pom.xml
@@ -12,6 +12,7 @@
         <maven.compiler.source>11</maven.compiler.source>
         <maven.compiler.target>11</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <jackson.version>2.11.0</jackson.version>
     </properties>
 
     <build>
@@ -72,27 +73,24 @@
     </build>
 
     <dependencies>
-        <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
-            <artifactId>jackson-core</artifactId>
-            <version>2.11.0</version>
-        </dependency>
-        <dependency>
-            <groupId>com.fasterxml.jackson.core</groupId>
-            <artifactId>jackson-databind</artifactId>
-            <version>2.11.0</version>
-        </dependency>
         <dependency>
             <groupId>com.sparkjava</groupId>
             <artifactId>spark-core</artifactId>
             <version>2.9.3</version>
         </dependency>
+
+        <!--    JSON    -->
         <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-simple</artifactId>
-            <version>1.6.2</version>
-            <scope>test</scope>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-core</artifactId>
+            <version>${jackson.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>${jackson.version}</version>
+        </dependency>
+
         <!--    XSLT    -->
         <dependency>
             <groupId>net.sf.saxon</groupId>
@@ -105,6 +103,13 @@
             <version>2.7.2</version>
         </dependency>
 
+        <!-- Logging -->
+        <dependency>
+            <groupId>org.slf4j</groupId>
+            <artifactId>slf4j-simple</artifactId>
+            <version>1.6.2</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
             <artifactId>jcl-over-slf4j</artifactId>
@@ -128,7 +133,7 @@
             <artifactId>log4j</artifactId>
             <version>1.2.14</version>
         </dependency>
-        <!--    JSON    -->
+
     </dependencies>
 
 </project>
\ No newline at end of file