diff --git a/pom.xml b/pom.xml
index da23d1d..5d0b34a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -58,6 +58,11 @@
   </properties>
 
   <dependencies>
+    <dependency>
+      <groupId>com.google.guava</groupId>
+      <artifactId>guava</artifactId>
+      <version>23.0</version>
+    </dependency>
     <dependency>
       <groupId>org.mybatis</groupId>
       <artifactId>mybatis</artifactId>