diff --git a/pom.xml b/pom.xml
index e4dd40c..231d2cf 100644
--- a/pom.xml
+++ b/pom.xml
@@ -260,40 +260,15 @@
 			<version>1.3.3</version>
 		</dependency>
 		<dependency>
-			<groupId>org.bouncycastle</groupId>
-			<artifactId>bcprov-jdk16</artifactId>
-			<version>1.46</version>
-		</dependency>
-		<dependency>
-			<groupId>xalan</groupId>
-			<artifactId>xalan</artifactId>
-			<version>2.7.2</version>
-		</dependency>
-		<dependency>
 			<groupId>org.apache.poi</groupId>
 			<artifactId>poi</artifactId>
-			<version>3.15</version>
-		</dependency>
-		<dependency>
-			<groupId>com.thoughtworks.xstream</groupId>
-			<artifactId>xstream</artifactId>
-			<version>1.4.10</version>
+			<version>3.17</version>
 		</dependency>
 		<dependency>
 			<groupId>org.apache.httpcomponents</groupId>
 			<artifactId>httpclient</artifactId>
 			<version>4.5.3</version>
 		</dependency>
-		<dependency>
-			<groupId>com.fasterxml.jackson.core</groupId>
-			<artifactId>jackson-core</artifactId>
-			<version>2.8.6</version>
-		</dependency>
-		<dependency>
-			<groupId>xerces</groupId>
-			<artifactId>xercesImpl</artifactId>
-			<version>2.11.0.SP5</version>
-		</dependency>
 	</dependencies>
 	<version>1.2.1-SNAPSHOT</version>
 </project>