diff --git a/FastOMA/_hog_class.py b/FastOMA/_hog_class.py
index 1af9536..d56768a 100644
--- a/FastOMA/_hog_class.py
+++ b/FastOMA/_hog_class.py
@@ -3,6 +3,10 @@
 from Bio.Align import MultipleSeqAlignment
 from Bio.SeqRecord import SeqRecord
 from random import sample
+import random
+from . import _config
+
+random.seed(_config.seed_random)
 import itertools
 
 from . import _utils_subhog