diff --git a/server/build.gradle b/server/build.gradle
index d50be48afc023..8335d95b1d34e 100644
--- a/server/build.gradle
+++ b/server/build.gradle
@@ -113,7 +113,7 @@ dependencies {
 
   // utilities
   api project(":libs:opensearch-cli")
-  api 'com.carrotsearch:hppc:0.8.1'
+  api 'com.carrotsearch:hppc:0.9.1'
 
   // time handling, remove with java 8 time
   api "joda-time:joda-time:${versions.joda}"