diff --git a/Gemfile b/Gemfile
index 5a5828660..9bd02be78 100644
--- a/Gemfile
+++ b/Gemfile
@@ -42,12 +42,12 @@ gem "simple_captcha2", "0.5.0", require: "simple_captcha"
 
 # Background processing
 
-gem "redis", "4.7.0"
-gem "sidekiq", "6.5.1"
+gem "redis-client", "0.14.1"
+gem "sidekiq", "7.1.2"
 
 # Scheduled processing
 
-gem "sidekiq-cron", "1.6.0"
+gem "sidekiq-cron", "1.10.1"
 
 # Compression
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 0f15a2565..5bdd3b938 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -143,7 +143,7 @@ GEM
     coderay (1.1.3)
     concurrent-ruby (1.2.2)
     configurate (0.5.0)
-    connection_pool (2.2.5)
+    connection_pool (2.4.1)
     crack (0.4.5)
       rexml
     crass (1.0.6)
@@ -311,7 +311,7 @@ GEM
       fog-core
       nokogiri (>= 1.5.11, < 2.0.0)
     formatador (1.1.0)
-    fugit (1.5.3)
+    fugit (1.8.1)
       et-orbi (~> 1, >= 1.2.7)
       raabro (~> 1.4)
     fuubar (2.5.1)
@@ -602,7 +602,8 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     redcarpet (3.5.1)
-    redis (4.7.0)
+    redis-client (0.14.1)
+      connection_pool
     regexp_parser (2.8.1)
     request_store (1.5.1)
       rack (>= 1.4)
@@ -676,13 +677,15 @@ GEM
     secure_headers (6.3.3)
     shoulda-matchers (4.5.1)
       activesupport (>= 4.2.0)
-    sidekiq (6.5.1)
-      connection_pool (>= 2.2.2)
-      rack (~> 2.0)
-      redis (>= 4.2.0)
-    sidekiq-cron (1.6.0)
-      fugit (~> 1)
-      sidekiq (>= 4.2.1)
+    sidekiq (7.1.2)
+      concurrent-ruby (< 2)
+      connection_pool (>= 2.3.0)
+      rack (>= 2.2.4)
+      redis-client (>= 0.14.0)
+    sidekiq-cron (1.10.1)
+      fugit (~> 1.8)
+      globalid (>= 1.0.1)
+      sidekiq (>= 6)
     simple_captcha2 (0.5.0)
       rails (>= 4.1)
     simple_oauth (0.3.1)
@@ -869,7 +872,7 @@ DEPENDENCIES
   rails-i18n (= 6.0.0)
   rails-timeago (= 2.20.0)
   redcarpet (= 3.5.1)
-  redis (= 4.7.0)
+  redis-client (= 0.14.1)
   responders (= 3.1.0)
   rqrcode (= 2.2.0)
   rspec-json_expectations (~> 2.1)
@@ -881,8 +884,8 @@ DEPENDENCIES
   sassc-rails (= 2.1.2)
   secure_headers (= 6.3.3)
   shoulda-matchers (= 4.5.1)
-  sidekiq (= 6.5.1)
-  sidekiq-cron (= 1.6.0)
+  sidekiq (= 7.1.2)
+  sidekiq-cron (= 1.10.1)
   simple_captcha2 (= 0.5.0)
   simplecov (= 0.21.2)
   sinon-rails (= 1.15.0)
diff --git a/app/controllers/invitations_controller.rb b/app/controllers/invitations_controller.rb
index c6a5f516c..65486642d 100644
--- a/app/controllers/invitations_controller.rb
+++ b/app/controllers/invitations_controller.rb
@@ -30,7 +30,7 @@ class InvitationsController < ApplicationController
     session[:invalid_email_invites] = invalid_emails
 
     unless valid_emails.empty?
-      Workers::Mail::InviteEmail.perform_async(valid_emails.join(","), current_user.id, inviter_params)
+      Workers::Mail::InviteEmail.perform_async(valid_emails.join(","), current_user.id, inviter_params.to_h)
     end
 
     if emails.empty?
diff --git a/app/workers/archive_base.rb b/app/workers/archive_base.rb
index 6b8b38a82..b6b2001e7 100644
--- a/app/workers/archive_base.rb
+++ b/app/workers/archive_base.rb
@@ -31,7 +31,7 @@ module Workers
         !(Process.pid.to_s == process_id.split(":")[1] && Thread.current.object_id.to_s(36) == thread_id) &&
           ArchiveBase.subclasses.map(&:to_s).include?(work["payload"]["class"])
       end
-    rescue Redis::CannotConnectError
+    rescue RedisClient::CannotConnectError
       # If code gets to this point and there is no Redis conenction, we're
       # running in a Test environment and have not mocked Sidekiq::Workers, so
       # we're not testing the concurrency-limiting behavior.
diff --git a/script/server b/script/server
index aee6cf4f5..af68b8f18 100755
--- a/script/server
+++ b/script/server
@@ -128,7 +128,8 @@ if [ -n "$redis_url" ]
 then
   redis_param="url: '$redis_url'"
 fi
-if [ "$(bin/bundle exec ruby -e "require 'redis'; puts Redis.new($redis_param).ping" 2> /dev/null | grep -vE "is not writable|as your home directory temporarily" )" != "PONG" ]
+echo $redis_param
+if [ "$(bin/bundle exec ruby -e "require 'redis-client'; puts RedisClient.config($redis_param).new_client.call('PING')" 2> /dev/null | grep -vE "is not writable|as your home directory temporarily" )" != "PONG" ]
 then
   fatal "Can't connect to redis. Please check if it's running and if environment.redis is configured correctly in $CONFIG_FILE."
 fi
diff --git a/spec/controllers/invitations_controller_spec.rb b/spec/controllers/invitations_controller_spec.rb
index 87232f401..f7cf2dfc9 100644
--- a/spec/controllers/invitations_controller_spec.rb
+++ b/spec/controllers/invitations_controller_spec.rb
@@ -39,7 +39,7 @@ describe InvitationsController, type: :controller do
 
       it "creates an InviteEmail worker" do
         expect(Workers::Mail::InviteEmail).to receive(:perform_async).with(
-          emails, alice.id, invite_params[:email_inviter]
+          emails, alice.id, invite_params[:email_inviter].stringify_keys
         )
         post :create, params: invite_params
       end
@@ -85,7 +85,7 @@ describe InvitationsController, type: :controller do
 
       it "creates an InviteEmail worker" do
         expect(Workers::Mail::InviteEmail).to receive(:perform_async).with(
-          valid_emails, alice.id, invite_params[:email_inviter]
+          valid_emails, alice.id, invite_params[:email_inviter].stringify_keys
         )
         post :create, params: invite_params
       end