diff --git a/Gemfile b/Gemfile
index dbacb6291..e0163cffb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -49,13 +49,11 @@ gem 'rubyzip', :require => "zip"
 gem 'coinbase'
 gem 'stripe'
 gem 'twitter'
+gem 'aws-sdk'
 
 # needed for looser jpeg header compat
 gem 'ruby-imagespec', :require => "image_spec", :git => "https://github.com/r888888888/ruby-imagespec.git", :branch => "exif-fixes"
 
-# needed for rails 4.1.0 compat
-gem 'aws-s3', :require => "aws/s3"
-
 group :production do
   gem 'newrelic_rpm'
   gem 'unicorn', :platforms => :ruby
diff --git a/Gemfile.lock b/Gemfile.lock
index c1e74b6c8..34c6335e0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,10 +37,10 @@ GEM
     addressable (2.3.6)
     arel (5.0.1.20140414130214)
     awesome_print (1.2.0)
-    aws-s3 (0.6.3)
-      builder
-      mime-types
-      xml-simple
+    aws-sdk (1.28.1)
+      json (~> 1.4)
+      nokogiri (>= 1.4.4)
+      uuidtools (~> 2.1)
     bcrypt (3.1.10)
     bcrypt (3.1.10-x64-mingw32)
     bcrypt-ruby (3.1.5)
@@ -290,6 +290,7 @@ GEM
       kgio (~> 2.6)
       rack
       raindrops (~> 0.7)
+    uuidtools (2.1.4)
     vcr (2.9.0)
     webmock (1.17.4)
       addressable (>= 2.2.7)
@@ -298,7 +299,6 @@ GEM
     whenever (0.9.2)
       activesupport (>= 2.3.4)
       chronic (>= 0.6.3)
-    xml-simple (1.1.5)
 
 PLATFORMS
   ruby
@@ -306,7 +306,7 @@ PLATFORMS
 
 DEPENDENCIES
   awesome_print
-  aws-s3
+  aws-sdk
   bcrypt-ruby
   byebug
   capistrano
diff --git a/app/models/amazon_backup.rb b/app/models/amazon_backup.rb
index 2168237de..3dc76725a 100644
--- a/app/models/amazon_backup.rb
+++ b/app/models/amazon_backup.rb
@@ -14,25 +14,28 @@ class AmazonBackup < ActiveRecord::Base
 
   def self.execute
     last_id = AmazonBackup.last_id
+    credentials = Aws::Credentials.new(Danbooru.config.amazon_s3_access_key_id, Danbooru.config.amazon_s3_secret_access_key)
+    client = Aws::S3::Client.new(region: "us-west-2", credentials: credentials)
+    bucket = Danbooru.config.amazon_s3_bucket_name
 
     Post.where("id > ?", last_id).limit(1000).order("id").each do |post|
-      AWS::S3::Base.establish_connection!(
-        :access_key_id => Danbooru.config.amazon_s3_access_key_id,
-        :secret_access_key => Danbooru.config.amazon_s3_secret_access_key,
-        :server => "s3.amazonaws.com"
-      )
-
       if File.exists?(post.file_path)
         base64_md5 = Base64.encode64(Digest::MD5.digest(File.read(post.file_path)))
-        AWS::S3::S3Object.store(File.basename(post.file_path), open(post.file_path, "rb"), Danbooru.config.amazon_s3_bucket_name, "Content-MD5" => base64_md5)
+        key = File.basename(post.file_path)
+        body = open(post.file_path, "rb")
+        client.put_object(bucket: bucket, key: key, body: body, content_md5: base64_md5)
       end
 
       if post.has_preview? && File.exists?(post.preview_file_path)
-        AWS::S3::S3Object.store("preview/#{post.md5}.jpg", open(post.preview_file_path, "rb"), Danbooru.config.amazon_s3_bucket_name)
+        key = "preview/#{post.md5}.jpg"
+        body = open(post.preview_file_path, "rb")
+        client.put_object(bucket: bucket, key: key, body: body)
       end
 
       if File.exists?(post.large_file_path)
-        AWS::S3::S3Object.store("large/#{post.md5}.#{post.large_file_ext}", open(post.large_file_path, "rb"), Danbooru.config.amazon_s3_bucket_name)
+        key = "large/#{post.md5}.#{post.large_file_ext}"
+        body = open(post.large_file_path, "rb")
+        client.put_object(bucket: bucket, key: key, body: body)
       end
 
       AmazonBackup.update_id(post.id)
diff --git a/script/donmai/backup_db_to_s3 b/script/donmai/backup_db_to_s3
index f3de65c29..e79a2bd96 100755
--- a/script/donmai/backup_db_to_s3
+++ b/script/donmai/backup_db_to_s3
@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 
 require 'rubygems'
-require 'aws/s3'
+require 'aws-sdk/s3'
 
 MAX_BACKUPS = 30
 
@@ -19,14 +19,15 @@ end
 
 access_key = open("#{home}/.s3/access_key").read.strip
 secret_access_key = open("#{home}/.s3/secret_access_key").read.strip
+credentials = Aws::Credentials.new(access_key, secret_access_key)
+client = Aws::S3::Client.new(region: "us-west-2", credentials: credentials)
+bucket = "danbooru-backup"
 
-AWS::S3::Base.establish_connection!(:access_key_id => access_key, :secret_access_key => secret_access_key, :server => "s3.amazonaws.com")
-
-current_backups = AWS::S3::Bucket.find("danbooru-backup").objects.map {|x| x.key}.select {|x| x =~ /^db-/}.sort.reverse
+current_backups = client.list_objects(buckets: buckets).contents.map {|x| x.key}.select {|x| x =~ /^db-/}.sort.reverse
 
 if current_backups.size > MAX_BACKUPS
   current_backups[MAX_BACKUPS..-1].each do |old_backup|
-    AWS::S3::S3Object.delete(old_backup, "danbooru-backup")
+    client.delete_object(bucket: bucket, key: old_backup)
     puts "Deleted old backup #{old_backup}"
   end
 end
@@ -37,7 +38,7 @@ filename = data.mtime.strftime("db-%Y-%m-%d-%H-%M")
 tries = 0
 
 begin
-  AWS::S3::S3Object.store(filename, data, "danbooru-backup", :access => :private)
+  client.put_object(bucket: bucket, key: filename, body: data, :acl => "private")
 rescue Errno::EPIPE
   tries += 1
   if tries > 3