fix warning

pom.xml

@@ -120,17 +120,17 @@
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-core</artifactId>
-			<version>2.9.4</version>
+			<version>2.9.8</version>
 		</dependency>
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-databind</artifactId>
-			<version>2.9.4</version>
+			<version>2.9.8</version>
 		</dependency>
 		<dependency>
 			<groupId>com.fasterxml.jackson.core</groupId>
 			<artifactId>jackson-annotations</artifactId>
-			<version>2.9.4</version>
+			<version>2.9.8</version>
 		</dependency>
 	</dependencies>