diff --git a/ab_admin.gemspec b/ab_admin.gemspec
index 112654e9..8a9ce563 100644
--- a/ab_admin.gemspec
+++ b/ab_admin.gemspec
@@ -22,7 +22,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'ransack'
   s.add_dependency 'has_scope'
   s.add_dependency 'simple_slug'
-  s.add_dependency 'devise', '~> 3.3'
+  s.add_dependency 'devise', '~> 4'
   s.add_dependency 'cancancan', '~> 1.7'
   s.add_dependency 'galetahub-enum_field'
   s.add_dependency 'awesome_nested_set', '~> 3.0.1'
diff --git a/app/controllers/admin/base_controller.rb b/app/controllers/admin/base_controller.rb
index 39729f94..55f95cbd 100644
--- a/app/controllers/admin/base_controller.rb
+++ b/app/controllers/admin/base_controller.rb
@@ -176,7 +176,7 @@ def track_current_action(*)
     track_action if settings[:history]
   end
 
-  def interpolation_options
+  def flash_interpolation_options
     return {} if collection_action? || resource.errors.empty?
     {errors: resource.errors.full_messages.map { |m| "<br/> - #{m}" }.join.html_safe}
   end
diff --git a/lib/ab_admin/carrierwave/base_uploader.rb b/lib/ab_admin/carrierwave/base_uploader.rb
index 5b5920b7..00947b24 100644
--- a/lib/ab_admin/carrierwave/base_uploader.rb
+++ b/lib/ab_admin/carrierwave/base_uploader.rb
@@ -1,14 +1,17 @@
 require 'mime/types'
 require 'mini_magick'
 require 'carrierwave/processing/mini_magick'
-require 'carrierwave/processing/mime_types'
+begin require 'carrierwave/processing/mime_types'; rescue LoadError; end
 
 module AbAdmin
   module CarrierWave
     class BaseUploader < ::CarrierWave::Uploader::Base
       include ::CarrierWave::MiniMagick
-      include ::CarrierWave::MimeTypes
       include AbAdmin::Utils::EvalHelpers
+      if defined? ::CarrierWave::MimeTypes
+        include ::CarrierWave::MimeTypes
+        process :set_content_type
+      end
 
       class_attribute :transliterate, :human_filenames
       self.transliterate = true
@@ -20,8 +23,6 @@ class BaseUploader < ::CarrierWave::Uploader::Base
 
       storage :file
 
-      process :set_content_type
-
       with_options if: :image? do |img|
         img.process :strip
         img.process cropper: lambda { |model| model.cropper_geometry }
@@ -66,6 +67,7 @@ def store_model_filename(record)
       end
 
       alias_method :store_filename, :filename
+      alias_method(:extension_white_list, :extension_whitelist) if instance_methods.include?(:extension_whitelist)
 
       def filename
         internal_identifier || model.send("#{mounted_as}_file_name") || (store_filename && "#{secure_token}#{File.extname(store_filename).downcase}")