diff --git a/pom.xml b/pom.xml
index 432bbb9..a0d2f8d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -355,7 +355,7 @@
     <dependency>
       <groupId>org.hdrhistogram</groupId>
       <artifactId>HdrHistogram</artifactId>
-      <version>2.1.12</version>
+      <version>2.2.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>