diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6b7e5a948..0117c7bb1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog Fab-manager
 
+## v4.5.2 2020 July 1st
+
+- Fix a bug: unable to set stripe public key in production
+- Fix a bug: health API is broken if ElasticSearch is not present
+- Fix a bug: unable to sync members with stripe
+- Fix a bug: version check is not working
+- Fix a bug: enabling auth_provider from the tests happens twice in coverall context
+- [TODO DEPLOY] `rails fablab:maintenance:clean_workers`
+
 ## v4.5.1 2020 July 1st
 
 - Ability to run the upgrade without interactions
diff --git a/app/assets/javascripts/controllers/admin/invoices.js.erb b/app/assets/javascripts/controllers/admin/invoices.js.erb
index d1e4edda4..ecbc2017b 100644
--- a/app/assets/javascripts/controllers/admin/invoices.js.erb
+++ b/app/assets/javascripts/controllers/admin/invoices.js.erb
@@ -1320,13 +1320,13 @@ Application.Controllers.controller('StripeKeysModalController', ['$scope', '$uib
     /* PUBLIC SCOPE */
 
     // public key
-    $scope.publicKey = stripeKeys.stripe_public_key;
+    $scope.publicKey = stripeKeys.stripe_public_key || '';
 
     // test status of the public key
     $scope.publicKeyStatus = undefined;
 
     // secret key
-    $scope.secretKey = stripeKeys.stripe_secret_key;
+    $scope.secretKey = stripeKeys.stripe_secret_key || '';
 
     // test status of the secret key
     $scope.secretKeyStatus = undefined;
@@ -1370,10 +1370,7 @@ Application.Controllers.controller('StripeKeysModalController', ['$scope', '$uib
           'Content-Type': 'application/x-www-form-urlencoded'
         },
         data: $httpParamSerializerJQLike({
-          'card[number]': 4242424242424242,
-          'card[cvc]': 123,
-          'card[exp_month]': 12,
-          'card[exp_year]': today.getFullYear().toString().substring(2),
+          'pii[id_number]': 'test',
         })
       }).then(function () {
         $scope.publicKeyStatus = true;
diff --git a/app/services/health_service.rb b/app/services/health_service.rb
index 5926e6a4f..0c82bbf47 100644
--- a/app/services/health_service.rb
+++ b/app/services/health_service.rb
@@ -25,6 +25,8 @@ class HealthService
     !!response.body # rubocop:disable Style/DoubleNegation
   rescue Elasticsearch::Transport::Transport::Error
     false
+  rescue Faraday::ConnectionFailed
+    false
   end
 
   def self.migrations?
diff --git a/config/application.rb b/config/application.rb
index dfc8ef38c..9c3b9c138 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -74,7 +74,7 @@ module Fablab
       plugins&.each(&:notify_after_initialize)
 
       require 'version'
-      Version.check_and_schedule
+      Version.check
     end
   end
 end
diff --git a/config/schedule.yml b/config/schedule.yml
index 40cf7d255..feef96be8 100644
--- a/config/schedule.yml
+++ b/config/schedule.yml
@@ -37,6 +37,14 @@ close_period_reminder_worker:
 free_disk_space:
   cron: "0 5 * * 0" # every sunday at 5am
   class: "FreeDiskSpaceWorker"
-  queue: default
+  queue: system
+
+# schedule a version check, every week at the current day+time
+# this will prevent that all the instances query the hub simultaneously
+<% m = DateTime.current.minute - 1; h = DateTime.current.hour; d = DateTime.current.cwday %>
+version_check:
+  cron: <%="#{m} #{h} * * #{d}" %>
+  class: 'VersionCheckWorker'
+  queue: system
 
 <%= PluginRegistry.insert_code('yml.schedule') %>
diff --git a/config/sidekiq.yml b/config/sidekiq.yml
index 685a5835b..1abddf065 100644
--- a/config/sidekiq.yml
+++ b/config/sidekiq.yml
@@ -7,4 +7,5 @@
   - [default, 5]
   - [devise_mailer, 3]
   - [mailers, 3]
-  - [elasticsearch, 2]
\ No newline at end of file
+  - [elasticsearch, 2]
+  - [system, 1]
diff --git a/lib/tasks/fablab/maintenance.rake b/lib/tasks/fablab/maintenance.rake
index b2121b596..af2d7eb72 100644
--- a/lib/tasks/fablab/maintenance.rake
+++ b/lib/tasks/fablab/maintenance.rake
@@ -82,5 +82,14 @@ namespace :fablab do
       require 'version'
       puts Version.current
     end
+
+    desc 'clean the cron workers'
+    task clean_workers: :environment do
+
+      Sidekiq::Cron::Job.destroy_all!
+      Sidekiq::Queue.new('system').clear
+      Sidekiq::Queue.new('default').clear
+      Sidekiq::DeadSet.new.clear
+    end
   end
 end
diff --git a/lib/tasks/fablab/stripe.rake b/lib/tasks/fablab/stripe.rake
index 83b903590..8fa685318 100644
--- a/lib/tasks/fablab/stripe.rake
+++ b/lib/tasks/fablab/stripe.rake
@@ -49,7 +49,7 @@ namespace :fablab do
     desc 'sync users to the stripe database'
     task sync_members: :environment do
       puts 'We create all non-existing customers on stripe. This may take a while, please wait...'
-      SyncMembersOnStripeWorker.perform
+      SyncMembersOnStripeWorker.new.perform
       puts 'Done'
     end
 
diff --git a/lib/version.rb b/lib/version.rb
index 75666e664..90b5388a2 100644
--- a/lib/version.rb
+++ b/lib/version.rb
@@ -17,21 +17,11 @@ class Version
     json['up_to_date']
   end
 
-  # periodically retrieve the last published version from the hub and save it into the database
-  def self.check_and_schedule
-    job_name = 'Automatic version check'
+  # retrieve the last published version from the hub and save it into the database
+  def self.check
     return if (Rails.env.development? || Rails.env.test?) && ENV['FORCE_VERSION_CHECK'] != 'true'
 
-    job = Sidekiq::Cron::Job.find name: job_name
-    unless job
-      # schedule a version check, every week at the current day+time
-      # this will prevent that all the instances query the hub simultaneously
-      m = DateTime.current.minute
-      h = DateTime.current.hour
-      d = DateTime.current.cwday
-      job = Sidekiq::Cron::Job.new(name: job_name, cron: "#{m} #{h} * * #{d}", class: 'VersionCheckWorker')
-      job.save
-    end
-    job.enque!
+    # check the version
+    VersionCheckWorker.perform_async
   end
 end
diff --git a/package.json b/package.json
index 2a0c25431..2f6634ea9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "fab-manager",
-  "version": "4.5.1",
+  "version": "4.5.2",
   "description": "Fab-manager is the FabLab management solution. It provides a comprehensive, web-based, open-source tool to simplify your administrative tasks and your marker's projects.",
   "keywords": [
     "fablab",
diff --git a/test/integration/auth_providers_test.rb b/test/integration/auth_providers_test.rb
index 1f230e0b4..d985ab580 100644
--- a/test/integration/auth_providers_test.rb
+++ b/test/integration/auth_providers_test.rb
@@ -59,7 +59,7 @@ class AuthProvidersTest < ActionDispatch::IntegrationTest
     assert_equal 2, provider[:providable_attributes][:o_auth2_mappings_attributes].length
 
     # now let's activate this new provider
-    Fablab::Application.load_tasks
+    Fablab::Application.load_tasks if Rake::Task.tasks.empty?
     Rake::Task['fablab:auth:switch_provider'].invoke(name)
 
     db_provider.reload
@@ -69,4 +69,4 @@ class AuthProvidersTest < ActionDispatch::IntegrationTest
       assert_not_nil u.auth_token
     end
   end
-end
\ No newline at end of file
+end