Build with Java 7

Change-Id: I43c250c60544000e6e34a8120e0d6621f712a7e6
diff --git a/pom.xml b/pom.xml
index 1a800a7..67db036 100644
--- a/pom.xml
+++ b/pom.xml
@@ -52,8 +52,8 @@
         <artifactId>maven-compiler-plugin</artifactId>
         <version>2.5.1</version>
         <configuration>
-          <source>1.6</source>
-          <target>1.6</target>
+          <source>1.7</source>
+          <target>1.7</target>
         </configuration>
       </plugin>
       <plugin>