diff --git a/modules/adventcalendar/chatCommand.go b/modules/adventcalendar/chatCommand.go
index d9ab10a..b1fcd8e 100644
--- a/modules/adventcalendar/chatCommand.go
+++ b/modules/adventcalendar/chatCommand.go
@@ -52,6 +52,7 @@ func (Chat) AppCmd() *discordgo.ApplicationCommand {
 				DescriptionLocalizations: *util.TranslateLocalization(tp + "option.draw.description"),
 			},
 		},
+		DefaultMemberPermissions: util.IntZero(), // Set to '0' to deny for everyone by default. See https://discord.com/developers/docs/interactions/application-commands#application-command-permissions-object-using-default-permissions
 	}
 }
 
diff --git a/modules/secretsanta/chatCommand.go b/modules/secretsanta/chatCommand.go
index f6cf17e..f5b5cd5 100644
--- a/modules/secretsanta/chatCommand.go
+++ b/modules/secretsanta/chatCommand.go
@@ -35,6 +35,7 @@ func (Chat) AppCmd() *discordgo.ApplicationCommand {
 				DescriptionLocalizations: *util.TranslateLocalization(tp + "cmd.option.update.description"),
 			},
 		},
+		DefaultMemberPermissions: util.IntZero(), // Set to '0' to deny for everyone by default. See https://discord.com/developers/docs/interactions/application-commands#application-command-permissions-object-using-default-permissions
 	}
 }
 
diff --git a/modules/secretsanta/messageCommandSetup.go b/modules/secretsanta/messageCommandSetup.go
index dd7da1e..ae0a6c9 100644
--- a/modules/secretsanta/messageCommandSetup.go
+++ b/modules/secretsanta/messageCommandSetup.go
@@ -18,9 +18,10 @@ type MsgCmd struct {
 // AppCmd (ApplicationCommand) returns the definition of the chat command
 func (cmd *MsgCmd) AppCmd() *discordgo.ApplicationCommand {
 	return &discordgo.ApplicationCommand{
-		Type:              discordgo.MessageApplicationCommand,
-		Name:              lang.GetDefault(tp + "base"),
-		NameLocalizations: util.TranslateLocalization(tp + "base"),
+		Type:                     discordgo.MessageApplicationCommand,
+		Name:                     lang.GetDefault(tp + "base"),
+		NameLocalizations:        util.TranslateLocalization(tp + "base"),
+		DefaultMemberPermissions: util.IntZero(), // Set to '0' to deny for everyone by default. See https://discord.com/developers/docs/interactions/application-commands#application-command-permissions-object-using-default-permissions
 	}
 }