diff --git a/requirements.txt b/requirements.txt
index 0f65647..1a5e42d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,3 +5,4 @@ sisl==0.14.3
 netCDF4==1.7.2
 openmpi
 mpi4py
+threadpoolctl
\ No newline at end of file