--- a/server/pom.xml	Sun May 25 13:45:24 2014 +0900
+++ b/server/pom.xml	Wed Jun 04 12:36:17 2014 +0200
@@ -40,6 +40,7 @@
         <commons-codec-version>1.8</commons-codec-version>
         <bson4jackson-version>2.2.3</bson4jackson-version>
         <fasterxml-java-uuid-generator-version>3.1.3</fasterxml-java-uuid-generator-version>
+        <guava-version>17.0</guava-version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     </properties>
 
@@ -441,6 +442,11 @@
             <artifactId>commons-collections4</artifactId>
             <version>4.0</version>
         </dependency>
+        <dependency>
+            <groupId>com.google.guava</groupId>
+            <artifactId>guava</artifactId>
+            <version>${guava-version}</version>
+        </dependency>
     </dependencies>
     <organization>
         <name>IRI</name>