diff --git a/core/pom.xml b/core/pom.xml
index c5ae61ecc7d992666b8e5526e30c5f84d15e5dc0..16617ac6d78ac0b3621c4c66fefd70033cefae1a 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -32,6 +32,10 @@
       <version>6.1.1</version>
       <scope>test</scope>
     </dependency>
-  </dependencies>	
-
+    <dependency>
+      <groupId>org.hdrhistogram</groupId>
+      <artifactId>HdrHistogram</artifactId>
+      <version>2.1.3</version>
+    </dependency>
+  </dependencies>
 </project>