diff --git a/pom.xml b/pom.xml
index b47b01b09..42fcc11b2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -127,6 +127,13 @@
       <artifactId>jdom</artifactId>
       <version>1.1</version>
     </dependency>
+    <!-- https://mvnrepository.com/artifact/com.carrotsearch/hppc -->
+<dependency>
+    <groupId>com.carrotsearch</groupId>
+    <artifactId>hppc</artifactId>
+    <version>0.8.1</version>
+</dependency>
+
   </dependencies>
   <distributionManagement>
     <snapshotRepository>