diff --git a/radionets/evaluation/utils.py b/radionets/evaluation/utils.py
index 4d43b306..e8ea7045 100644
--- a/radionets/evaluation/utils.py
+++ b/radionets/evaluation/utils.py
@@ -510,7 +510,7 @@ def tn_numba_vec_parallel(mu, sig, a, b):
     return rv
 
 
-def trunc_rvs(mu, sig, num_samples, mode, target="parallel", nthreads=20):
+def trunc_rvs(mu, sig, num_samples, mode, target="cpu", nthreads=1):
     if mode == "amp":
         a = 0
         b = np.inf