Update to guava 19
diff --git a/pom.xml b/pom.xml
index e64b381..d10197c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -92,7 +92,7 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <java.version>1.7</java.version>
-    <guava.version>18.0</guava.version>
+    <guava.version>19.0</guava.version>
   </properties>
 
   <dependencyManagement>