diff --git a/mache/machines/chrysalis.cfg b/mache/machines/chrysalis.cfg
index 6368bf48..b071f70a 100644
--- a/mache/machines/chrysalis.cfg
+++ b/mache/machines/chrysalis.cfg
@@ -60,10 +60,10 @@ partitions = compute, debug
 parallel_executable = srun --mpi=pmi2 -l
 
 # cpu cores per node (without hyperthreading)
-cores_per_node = 128
+cores_per_node = 64
 
 # the maximum number of MPI tasks per node
-max_mpi_tasks_per_node = 128
+max_mpi_tasks_per_node = 64
 
 # CPU binding (cores or threads)
 cpu_bind = cores