diff --git a/mso-api-handlers/mso-api-handler-common/pom.xml b/mso-api-handlers/mso-api-handler-common/pom.xml
index eb9b394..d35db00 100644
--- a/mso-api-handlers/mso-api-handler-common/pom.xml
+++ b/mso-api-handlers/mso-api-handler-common/pom.xml
@@ -18,6 +18,8 @@
 		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 		<swagger-version>1.3.0</swagger-version>
 		<jax-rs-version>1.1.1</jax-rs-version>
+		<json4s-jackson-version>3.6.0</json4s-jackson-version>
+		<json4s-core-version>3.6.0</json4s-core-version>
 		<reflections-version>0.9.9-RC1</reflections-version>
 		<paranamer-version>2.5.2</paranamer-version>
 		<scannotation-version>1.0.3</scannotation-version>
@@ -62,20 +64,18 @@
 		<dependency>
 			<groupId>org.json4s</groupId>
 			<artifactId>json4s-jackson_2.12</artifactId>
+			<version>${json4s-jackson-version}</version>
 		</dependency>
 		<dependency>
 			<groupId>org.json4s</groupId>
 			<artifactId>json4s-core_2.12</artifactId>
+			<version>${json4s-core-version}</version>
 		</dependency>
 		<dependency>
 			<groupId>javax.servlet</groupId>
 			<artifactId>servlet-api</artifactId>
 			<version>2.5</version>
-		</dependency>
-		<dependency>
-			<groupId>org.javassist</groupId>
-			<artifactId>javassist</artifactId>
-		</dependency>
+		</dependency>		
 		<dependency>
 			<groupId>org.json</groupId>
 			<artifactId>json</artifactId>