diff --git a/app/models/invite.rb b/app/models/invite.rb
index 52c09e4806..bc4f16dba2 100644
--- a/app/models/invite.rb
+++ b/app/models/invite.rb
@@ -21,8 +21,8 @@ class Invite < ApplicationRecord
 
   # FIXME: make this a rails cfg key or whatev?
   TH_USE_INVITE_QUOTA = !!ENV['TH_USE_INVITE_QUOTA']
-  TH_INVITE_MAX_USES = ENV.fetch('TH_INVITE_MAX_USES', 25)
-  TH_ACTIVE_INVITE_SLOT_QUOTA = ENV.fetch('TH_ACTIVE_INVITE_SLOT_QUOTA', 40)
+  TH_INVITE_MAX_USES = ENV.fetch('TH_INVITE_MAX_USES', 25).to_i
+  TH_ACTIVE_INVITE_SLOT_QUOTA = ENV.fetch('TH_ACTIVE_INVITE_SLOT_QUOTA', 40).to_i
 
   belongs_to :user, inverse_of: :invites
   has_many :users, inverse_of: :invite
diff --git a/app/views/invites/_form.html.haml b/app/views/invites/_form.html.haml
index 31789feaf4..b736184fc6 100644
--- a/app/views/invites/_form.html.haml
+++ b/app/views/invites/_form.html.haml
@@ -3,9 +3,9 @@
 
   .fields-row
     .fields-row__column.fields-row__column-6.fields-group
-      = f.input :max_uses, wrapper: :with_label, collection: [1, 5, 10, 25], label_method: lambda { |num| I18n.t('invites.max_uses', count: num) }, prompt: I18n.t('invites.max_uses_prompt'), include_blank: false, include_hidden: false # required: true
+      = f.input :max_uses, wrapper: :with_label, collection: [1, 5, 10, 25], label_method: lambda { |num| I18n.t('invites.max_uses', count: num) }, prompt: I18n.t('invites.max_uses_prompt'), include_blank: false, include_hidden: false
     .fields-row__column.fields-row__column-6.fields-group
-      = f.input :expires_in, wrapper: :with_label, collection: [30.minutes, 1.hour, 6.hours, 12.hours, 1.day, 1.week, 1.month].map(&:to_i), label_method: lambda { |i| I18n.t("invites.expires_in.#{i}") }, prompt: I18n.t('invites.expires_in_prompt'), include_blank: false, include_hidden: false, selected: 1 # required: true
+      = f.input :expires_in, wrapper: :with_label, collection: [30.minutes, 1.hour, 6.hours, 12.hours, 1.day, 1.week, 1.month].map(&:to_i), label_method: lambda { |i| I18n.t("invites.expires_in.#{i}") }, prompt: I18n.t('invites.expires_in_prompt'), include_blank: false, include_hidden: false
 
   .fields-group
     = f.input :autofollow, wrapper: :with_label