diff --git a/app/models/channel/driver/sms/twilio.rb b/app/models/channel/driver/sms/twilio.rb
index da7c36e2d..1c482b843 100644
--- a/app/models/channel/driver/sms/twilio.rb
+++ b/app/models/channel/driver/sms/twilio.rb
@@ -26,7 +26,7 @@ class Channel::Driver::Sms::Twilio
 
       true
     rescue => e
-      Rails.logger.debug "Twilio error: #{e.inspect}"
+      Rails.logger.debug { "Twilio error: #{e.inspect}" }
       raise e
     end
   end
diff --git a/app/models/channel/filter/follow_up_check.rb b/app/models/channel/filter/follow_up_check.rb
index a27d9bf62..2e041505c 100644
--- a/app/models/channel/filter/follow_up_check.rb
+++ b/app/models/channel/filter/follow_up_check.rb
@@ -123,7 +123,7 @@ module Channel::Filter::FollowUpCheck
       article = message_id_article(message_id)
       next if article.blank?
 
-      Rails.logger.debug "Follow up for '##{article.ticket.number}' in references."
+      Rails.logger.debug { "Follow up for '##{article.ticket.number}' in references." }
       mail[:'x-zammad-ticket-id'] = article.ticket_id
       return true
     end
diff --git a/app/models/user/avatar.rb b/app/models/user/avatar.rb
index c034bfb23..89b914c29 100644
--- a/app/models/user/avatar.rb
+++ b/app/models/user/avatar.rb
@@ -15,7 +15,7 @@ class User
       return if image_source.blank?
       return if image_source.match?(URI::DEFAULT_PARSER.make_regexp(%w[http https]))
 
-      Rails.logger.debug "Removed invalid image source '#{image_source}' for user '#{email}'"
+      Rails.logger.debug { "Removed invalid image source '#{image_source}' for user '#{email}'" }
 
       self.image_source = nil
     end