Fixed empty left context and updated libraries.
diff --git a/pom.xml b/pom.xml
index 399261a..6eeb78f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,15 +4,20 @@
   <groupId>de.mannheim.ids</groupId>
   <artifactId>SRU-WS</artifactId>
   <packaging>war</packaging>
-  <version>1.0.1-SNAPSHOT</version>
+  <version>1.0.2</version>
   <name>SRU-WS Maven Webapp</name>
   <url>http://maven.apache.org</url>  
   
-  <dependencies>	
+  <dependencies>
+  	<dependency>
+		<groupId>junit</groupId>
+		<artifactId>junit</artifactId>
+		<version>4.12</version>
+	</dependency>	
 	<dependency>
         <groupId>eu.clarin.weblicht</groupId>
         <artifactId>wlfxb</artifactId>
-        <version>1.2.9</version>
+        <version>1.4.0</version>
     </dependency>       
   	<dependency>
    	  <groupId>javax.servlet</groupId>
@@ -28,12 +33,12 @@
     <dependency>
     	<groupId>com.sun.jersey</groupId>
     	<artifactId>jersey-servlet</artifactId>
-    	<version>1.13</version>
+    	<version>1.19.4</version>
     </dependency>    
     <dependency>
   	  <groupId>org.apache.httpcomponents</groupId>
   	  <artifactId>httpclient</artifactId>
-  	  <version>4.3.3</version>
+  	  <version>4.5.8</version>
     </dependency>    
     <!-- <dependency>
    	  <groupId>org.slf4j</groupId>
@@ -43,12 +48,12 @@
     <dependency>
 	  <groupId>org.slf4j</groupId>
 	  <artifactId>slf4j-log4j12</artifactId>
-	  <version>1.7.5</version>
+	  <version>1.7.26</version>
 	</dependency>
     <dependency>
     	<groupId>org.apache.commons</groupId>
     	<artifactId>commons-lang3</artifactId>
-    	<version>3.3.2</version>
+    	<version>3.9</version>
     </dependency>
   </dependencies>
   <build>
@@ -57,10 +62,10 @@
       <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
-          <version>2.1</version>
+          <version>3.8.1</version>
           <configuration>
-              <source>1.7</source>
-              <target>1.7</target>
+              <source>1.8</source>
+              <target>1.8</target>
           </configuration>
       </plugin>
     </plugins>