diff --git a/pyrfu/pyrf/int_sph_dist.py b/pyrfu/pyrf/int_sph_dist.py
index 9141c7c..fb16726 100644
--- a/pyrfu/pyrf/int_sph_dist.py
+++ b/pyrfu/pyrf/int_sph_dist.py
@@ -230,7 +230,7 @@ def int_sph_dist(vdf, speed, phi, theta, speed_grid, **kwargs):
     return pst
 
 
-@numba.jit(nopython=True, parallel=True, fastmath=True)
+@numba.jit(cache=True, nogil=True, parallel=True, nopython=True)
 def mc_pol_1d(
     vdf,
     v,
@@ -456,7 +456,7 @@ def mc_cart_3d(
     return f_g
 
 
-@numba.jit(nopython=True, parallel=True, fastmath=True)
+@numba.jit(cache=True, nogil=True, parallel=True, nopython=True)
 def mc_cart_2d(
     vdf,
     v,