diff --git a/plinth/modules/minetest/forms.py b/plinth/modules/minetest/forms.py
index e3f03c794..0e491a9d5 100644
--- a/plinth/modules/minetest/forms.py
+++ b/plinth/modules/minetest/forms.py
@@ -30,6 +30,8 @@ class MinetestForm(ServiceForm):
     max_players = forms.IntegerField(
         label=_('Maximum number of players'),
         required=True,
+        min_value=1,
+        max_value=100,
         help_text=_('You can change the maximum number of players playing \
                      minetest at a single instance of time'))