diff --git a/EA/fitness.py b/EA/fitness.py
index 5d86a67..05169ab 100644
--- a/EA/fitness.py
+++ b/EA/fitness.py
@@ -12,9 +12,7 @@ def build_cmd(candidate_name, opponent_name, nr_matches):
 
 
 def evaluate_deck_by_wins(individual):
-
-    number_of_matches = len(ct.OPPONENTS) * ct.MATCHES_PER_OPPONENT
-
+    number_of_matches = len(ct.OPPONENTS) * int(ct.MATCHES_PER_OPPONENT)
     decklist = genome_to_decklist(individual)
     filename = "candidate.dck"
     write_decklist(ct.CARD_DIRECTORY + filename, decklist)