diff --git a/pom.xml b/pom.xml
index 355609e..0d98b8f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -36,6 +36,7 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>		
+		<jackson.version>2.9.1</jackson.version>
 	</properties>
 	
 	<repositories>
@@ -77,17 +78,17 @@
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-core</artifactId>
-			<version>2.3.3</version>
+			<version>${jackson.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-annotations</artifactId>
-			<version>2.3.3</version>
+			<version>${jackson.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-databind</artifactId>
-			<version>2.3.3</version>
+			<version>${jackson.version}</version>
 		</dependency>
 		<dependency>
 			<groupId>junit</groupId>