diff --git a/htc/rocky:9-cuda-12.6.0/Dockerfile b/htc/rocky:9-cuda-12.6.0/Dockerfile
index 86b144f..e4d857e 100644
--- a/htc/rocky:9-cuda-12.6.0/Dockerfile
+++ b/htc/rocky:9-cuda-12.6.0/Dockerfile
@@ -78,7 +78,8 @@ RUN dnf -y install --allowerasing --enablerepo=osg-testing \
            time \
            tk-devel \
            wget \
-           which
+           which \
+           xxhash-devel
 
 # pelican
 RUN dnf -y upgrade --enablerepo=osg-upcoming stashcp
diff --git a/htc/rocky:9/Dockerfile b/htc/rocky:9/Dockerfile
index c18e120..a9b94e7 100644
--- a/htc/rocky:9/Dockerfile
+++ b/htc/rocky:9/Dockerfile
@@ -78,7 +78,8 @@ RUN dnf -y install --allowerasing --enablerepo=osg-testing \
            time \
            tk-devel \
            wget \
-           which
+           which \
+           xxhash-devel
 
 # pelican
 RUN dnf -y upgrade --enablerepo=osg-upcoming stashcp