diff --git a/lib/rack/attack.rb b/lib/rack/attack.rb
index b1b07c5..d7c7252 100644
--- a/lib/rack/attack.rb
+++ b/lib/rack/attack.rb
@@ -18,7 +18,6 @@ class Rack::Attack
   autoload :Track,                'rack/attack/track'
   autoload :StoreProxy,           'rack/attack/store_proxy'
   autoload :DalliProxy,           'rack/attack/store_proxy/dalli_proxy'
-  autoload :MemCacheProxy,        'rack/attack/store_proxy/mem_cache_proxy'
   autoload :MemCacheStoreProxy,   'rack/attack/store_proxy/mem_cache_store_proxy'
   autoload :RedisProxy,           'rack/attack/store_proxy/redis_proxy'
   autoload :RedisStoreProxy,      'rack/attack/store_proxy/redis_store_proxy'
diff --git a/lib/rack/attack/store_proxy.rb b/lib/rack/attack/store_proxy.rb
index fdd0e23..bf9ec90 100644
--- a/lib/rack/attack/store_proxy.rb
+++ b/lib/rack/attack/store_proxy.rb
@@ -3,7 +3,7 @@
 module Rack
   class Attack
     module StoreProxy
-      PROXIES = [DalliProxy, MemCacheStoreProxy, MemCacheProxy, RedisStoreProxy, RedisProxy, RedisCacheStoreProxy].freeze
+      PROXIES = [DalliProxy, MemCacheStoreProxy, RedisStoreProxy, RedisProxy, RedisCacheStoreProxy].freeze
 
       def self.build(store)
         client = unwrap_active_support_stores(store)
diff --git a/lib/rack/attack/store_proxy/mem_cache_proxy.rb b/lib/rack/attack/store_proxy/mem_cache_proxy.rb
deleted file mode 100644
index 8ed6583..0000000
--- a/lib/rack/attack/store_proxy/mem_cache_proxy.rb
+++ /dev/null
@@ -1,52 +0,0 @@
-# frozen_string_literal: true
-
-module Rack
-  class Attack
-    module StoreProxy
-      class MemCacheProxy < SimpleDelegator
-        def self.handle?(store)
-          defined?(::MemCache) && store.is_a?(::MemCache)
-        end
-
-        def initialize(store)
-          super(store)
-          stub_with_if_missing
-        end
-
-        def read(key)
-          # Second argument: reading raw value
-          get(key, true)
-        rescue MemCache::MemCacheError
-        end
-
-        def write(key, value, options = {})
-          # Third argument: writing raw value
-          set(key, value, options.fetch(:expires_in, 0), true)
-        rescue MemCache::MemCacheError
-        end
-
-        def increment(key, amount, _options = {})
-          incr(key, amount)
-        rescue MemCache::MemCacheError
-        end
-
-        def delete(key, _options = {})
-          with do |client|
-            client.delete(key)
-          end
-        rescue MemCache::MemCacheError
-        end
-
-        private
-
-        def stub_with_if_missing
-          unless __getobj__.respond_to?(:with)
-            class << self
-              def with; yield __getobj__; end
-            end
-          end
-        end
-      end
-    end
-  end
-end