diff --git a/.rubocop.yml b/.rubocop.yml
index c0d945b70..f06669aab 100644
--- a/.rubocop.yml
+++ b/.rubocop.yml
@@ -13,3 +13,8 @@ AllCops:
     - 'db/schema*.rb'
     - 'saas/db/migrate/**/*'
     - 'saas/db/saas_schema.rb'
+
+Style/NegatedIf:
+  Enabled: true
+Style/NegatedUnless:
+  Enabled: true
diff --git a/app/models/user/avatar.rb b/app/models/user/avatar.rb
index 02e437630..bdc14ba77 100644
--- a/app/models/user/avatar.rb
+++ b/app/models/user/avatar.rb
@@ -39,7 +39,7 @@ module User::Avatar
 
   private
     def avatar_content_type_allowed
-      if !ALLOWED_AVATAR_CONTENT_TYPES.include?(avatar.content_type)
+      unless ALLOWED_AVATAR_CONTENT_TYPES.include?(avatar.content_type)
         errors.add(:avatar, "must be a JPEG, PNG, GIF, or WebP image")
       end
     end
diff --git a/config/puma.rb b/config/puma.rb
index 70ca6ebb4..d3e65c671 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -22,7 +22,7 @@ if Fizzy.saas?
   plugin :yabeda_prometheus
 end
 
-if !Rails.env.local?
+unless Rails.env.local?
   # Because we expect fewer I/O waits than Rails apps that connect to the
   # database over the network, let's start with a baseline config of 1
   # worker per CPU, 1 thread per worker and tune it from there.