diff --git a/extras/heavy_em_n3lo/yad_grids.py b/extras/heavy_em_n3lo/yad_grids.py
index 90dfa909..2c3063d8 100644
--- a/extras/heavy_em_n3lo/yad_grids.py
+++ b/extras/heavy_em_n3lo/yad_grids.py
@@ -93,7 +93,7 @@ def run(n_threads, eta_grid, xi_grid):
         print("total running time: ", time.perf_counter() - start)
 
     res_mat = res_vec.reshape(len(xi_grid), len(eta_grid), 3)
-    
+
     for variation in range(-1, 1 + 1):
         if order == 1 and variation in [-1, 1]:
             continue