diff --git a/participation/models.py b/participation/models.py
index 765e709..bb80f43 100644
--- a/participation/models.py
+++ b/participation/models.py
@@ -710,7 +710,7 @@ class Participation(models.Model):
                 'content': content,
             })
 
-        if timezone.now() <= self.tournament.solution_limit + timedelta(hours=4):
+        if timezone.now() <= self.tournament.solution_limit + timedelta(hours=2):
             text = _("<p>The solutions for the tournament of {tournament} are due on the {date:%Y-%m-%d %H:%M}.</p>"
                      "<p>You have currently sent <strong>{nb_solutions}</strong> solutions. "
                      "We suggest to send at least <strong>{min_solutions}</strong> different solutions.</p>"
@@ -725,7 +725,7 @@ class Participation(models.Model):
                 'priority': 1,
                 'content': content,
             })
-        elif timezone.now() <= self.tournament.solutions_draw + timedelta(hours=4):
+        elif timezone.now() <= self.tournament.solutions_draw + timedelta(hours=2):
             text = _("<p>The draw of the solutions for the tournament {tournament} is planned on the "
                      "{date:%Y-%m-%d %H:%M}. You can join it on <a href='{url}'>this link</a>.</p>")
             url = reverse_lazy("draw:index")
@@ -737,7 +737,7 @@ class Participation(models.Model):
                 'priority': 1,
                 'content': content,
             })
-        elif timezone.now() <= self.tournament.syntheses_first_phase_limit + timedelta(hours=4):
+        elif timezone.now() <= self.tournament.syntheses_first_phase_limit + timedelta(hours=2):
             pool = self.pools.get(round=1, tournament=self.tournament)
             defender_passage = pool.passages.get(defender=self)
             opponent_passage = pool.passages.get(opponent=self)
@@ -782,7 +782,7 @@ class Participation(models.Model):
                 'priority': 1,
                 'content': content,
             })
-        elif timezone.now() <= self.tournament.syntheses_second_phase_limit + timedelta(hours=4):
+        elif timezone.now() <= self.tournament.syntheses_second_phase_limit + timedelta(hours=2):
             pool = self.pools.get(round=2, tournament=self.tournament)
             defender_passage = pool.passages.get(defender=self)
             opponent_passage = pool.passages.get(opponent=self)