diff --git a/jass/models/inittable.py b/jass/models/inittable.py
index 923e692273a884bb06fe53ad4f7095194c249b21..a04b44351acfb2b2ce0a69c94969bb000df8cec5 100644
--- a/jass/models/inittable.py
+++ b/jass/models/inittable.py
@@ -174,6 +174,7 @@ def compute_covariance_zscore(init_file_path, path_covariance=None):
         j = 0
         for tr1 in trait:
             for tr2 in trait[j:]:
+                sum_stat_jost_tab[[tr1, tr2]].replace([np.inf, -np.inf], np.nan, inplace=True)
                 cc = sum_stat_jost_tab[[tr1, tr2]].dropna()
                 cc = cc.loc[cc.max(1) < 4]