diff --git a/Gemfile b/Gemfile
index 0f529fa50..ba41f35c7 100644
--- a/Gemfile
+++ b/Gemfile
@@ -14,7 +14,6 @@ gem 'nokogiri', '~> 1.8.1'
 gem 'diffy', '~> 3.2', '>= 3.2.1'
 gem 'commonmarker', '~> 0.17.9'
 gem 'iso8601', '~> 0.9.0'
-gem 'patron', '~> 0.13.1', require: false
 gem 'maremma', '>= 4.1'
 gem 'bolognese', '~> 1.0'
 gem 'dalli', '~> 2.7', '>= 2.7.6'
diff --git a/Gemfile.lock b/Gemfile.lock
index d8374312a..aaab7a8f9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,7 +55,7 @@ GEM
     api-pagination (4.8.2)
     arel (9.0.0)
     aws-eventstream (1.0.1)
-    aws-partitions (1.127.0)
+    aws-partitions (1.128.0)
     aws-sdk-core (3.44.1)
       aws-eventstream (~> 1.0)
       aws-partitions (~> 1.0)
@@ -166,7 +166,7 @@ GEM
     database_cleaner (1.7.0)
     debug_inspector (0.0.3)
     diff-lcs (1.3)
-    diffy (3.2.1)
+    diffy (3.3.0)
     docile (1.1.5)
     docopt (0.6.1)
     domain_name (0.5.20180417)
@@ -230,12 +230,12 @@ GEM
       tilt
     hamster (3.0.0)
       concurrent-ruby (~> 1.0)
-    hashdiff (0.3.7)
+    hashdiff (0.3.8)
     hashie (3.6.0)
     htmlentities (4.3.4)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
-    i18n (1.3.0)
+    i18n (1.4.0)
       concurrent-ruby (~> 1.0)
     i18n_data (0.8.0)
     iso8601 (0.9.1)
@@ -318,7 +318,6 @@ GEM
     oj (2.18.5)
     oj_mimic_json (1.0.1)
     pandoc-ruby (2.0.2)
-    patron (0.13.1)
     postrank-uri (1.0.23)
       addressable (>= 2.3.0, < 2.6)
       nokogiri (>= 1.6.1, < 1.9)
@@ -367,7 +366,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
-    rdf (3.0.7)
+    rdf (3.0.9)
       hamster (~> 3.0)
       link_header (~> 0.0, >= 0.0.8)
     rdf-aggregate-repo (2.2.1)
@@ -535,7 +534,6 @@ DEPENDENCIES
   nokogiri (~> 1.8.1)
   oj (>= 2.8.3)
   oj_mimic_json (~> 1.0, >= 1.0.1)
-  patron (~> 0.13.1)
   premailer (~> 1.11, >= 1.11.1)
   pwqgen.rb (~> 0.1.0)
   rack-cors (~> 1.0, >= 1.0.2)
diff --git a/app/serializers/client_serializer.rb b/app/serializers/client_serializer.rb
index c77bf4976..47e32759e 100644
--- a/app/serializers/client_serializer.rb
+++ b/app/serializers/client_serializer.rb
@@ -3,6 +3,7 @@ class ClientSerializer
   set_key_transform :camel_lower
   set_type :clients
   set_id :uid
+  cache_options enabled: true, cache_length: 24.hours
   
   attributes :name, :symbol, :year, :contact_name, :contact_email, :description, :domains, :url, :created, :updated
 
diff --git a/app/serializers/doi_serializer.rb b/app/serializers/doi_serializer.rb
index b7089d63b..4f1762077 100644
--- a/app/serializers/doi_serializer.rb
+++ b/app/serializers/doi_serializer.rb
@@ -3,6 +3,7 @@ class DoiSerializer
   set_key_transform :camel_lower
   set_type :dois
   set_id :uid
+  # don't cache dois, as works are cached using the doi model
 
   attributes :doi, :prefix, :suffix, :identifiers, :creators, :titles, :publisher, :container, :publication_year, :subjects, :contributors, :dates, :language, :types, :related_identifiers, :sizes, :formats, :version, :rights_list, :descriptions, :geo_locations, :funding_references, :xml, :url, :content_url, :metadata_version, :schema_version, :source, :is_active, :state, :reason, :landing_page, :created, :registered, :updated
   attributes :prefix, :suffix, if: Proc.new { |object, params| params && params[:detail] }
diff --git a/app/serializers/provider_prefix_serializer.rb b/app/serializers/provider_prefix_serializer.rb
index b89aaf335..470ab51d2 100644
--- a/app/serializers/provider_prefix_serializer.rb
+++ b/app/serializers/provider_prefix_serializer.rb
@@ -4,6 +4,7 @@ class ProviderPrefixSerializer
   set_type "provider-prefixes"
   set_id :uid
   attributes :created, :updated
+  cache_options enabled: true, cache_length: 24.hours
 
   belongs_to :provider, record_type: :providers
   belongs_to :prefix, record_type: :prefixes
diff --git a/app/serializers/provider_serializer.rb b/app/serializers/provider_serializer.rb
index 65aad32aa..fc46d31c1 100644
--- a/app/serializers/provider_serializer.rb
+++ b/app/serializers/provider_serializer.rb
@@ -3,6 +3,7 @@ class ProviderSerializer
   set_key_transform :camel_lower
   set_type :providers
   set_id :uid
+  cache_options enabled: true, cache_length: 24.hours
 
   attributes :name, :symbol, :website, :contact_name, :contact_email, :phone, :description, :region, :country, :logo_url, :organization_type, :focus_area, :is_active, :has_password, :joined, :created, :updated
 
diff --git a/app/serializers/work_serializer.rb b/app/serializers/work_serializer.rb
index f5a216793..644817b94 100644
--- a/app/serializers/work_serializer.rb
+++ b/app/serializers/work_serializer.rb
@@ -3,6 +3,7 @@ class WorkSerializer
   set_key_transform :dash
   set_type :works
   set_id :identifier
+  cache_options enabled: true, cache_length: 24.hours
 
   attributes :doi, :identifier, :url, :author, :title, :container_title, :description, :resource_type_subtype, :data_center_id, :member_id, :resource_type_id, :version, :license, :schema_version, :results, :related_identifiers, :published, :registered, :checked, :updated, :media, :xml
 
diff --git a/config/initializers/_version.rb b/config/initializers/_version.rb
index f3025678e..8043845fe 100644
--- a/config/initializers/_version.rb
+++ b/config/initializers/_version.rb
@@ -1,5 +1,5 @@
 module Lupo
   class Application
-    VERSION = "2.3"
+    VERSION = "2.3.1"
   end
 end
\ No newline at end of file
diff --git a/config/initializers/elasticsearch.rb b/config/initializers/elasticsearch.rb
index 0dbbcb378..a2ee09c2d 100644
--- a/config/initializers/elasticsearch.rb
+++ b/config/initializers/elasticsearch.rb
@@ -9,7 +9,7 @@
     }
   }
   Elasticsearch::Model.client = Elasticsearch::Client.new(host: ENV['ES_HOST'], user: "elastic", password: ENV['ELASTIC_PASSWORD']) do |f|
-    f.adapter Faraday.default_adapter
+    f.adapter :excon
   end
 else
   Elasticsearch::Model.client = Elasticsearch::Client.new(host: ENV['ES_HOST'], port: '80', scheme: 'http') do |f|
@@ -18,6 +18,6 @@
       service: 'es',
       region: ENV['AWS_REGION']
 
-    f.adapter Faraday.default_adapter
+    f.adapter :excon
   end
 end
\ No newline at end of file