diff --git a/seminar/utils.py b/seminar/utils.py
index cacc52d8..9bca3c37 100644
--- a/seminar/utils.py
+++ b/seminar/utils.py
@@ -309,6 +309,9 @@ def podproblemy_v_cislu(cislo, problemy=None, hlavni_problemy=None):
 		else:
 			podproblemy[-1].append(problem)
 
+	for podproblem in podproblemy.keys():
+		podproblemy[podproblem] = sorted(podproblemy[podproblem], key=lambda it: it.kod)
+
 	return podproblemy
 
 class TypDeadline(Enum):