diff --git a/app/controllers/api/v1/statuses_controller.rb b/app/controllers/api/v1/statuses_controller.rb
index 106fc8224..98b1776ea 100644
--- a/app/controllers/api/v1/statuses_controller.rb
+++ b/app/controllers/api/v1/statuses_controller.rb
@@ -56,7 +56,7 @@ class Api::V1::StatusesController < Api::BaseController
     authorize @status, :destroy?
 
     @status.discard
-    RemovalWorker.perform_async(@status.id, redraft: true)
+    RemovalWorker.perform_async(@status.id, { 'redraft' => true })
     @status.account.statuses_count = @status.account.statuses_count - 1
 
     render json: @status, serializer: REST::StatusSerializer, source_requested: true
diff --git a/app/lib/activitypub/activity/create.rb b/app/lib/activitypub/activity/create.rb
index a861c34bc..33998c477 100644
--- a/app/lib/activitypub/activity/create.rb
+++ b/app/lib/activitypub/activity/create.rb
@@ -94,7 +94,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
     LinkCrawlWorker.perform_in(rand(1..59).seconds, @status.id)
 
     # Distribute into home and list feeds and notify mentioned accounts
-    ::DistributionWorker.perform_async(@status.id, silenced_account_ids: @silenced_account_ids) if @options[:override_timestamps] || @status.within_realtime_window?
+    ::DistributionWorker.perform_async(@status.id, { 'silenced_account_ids' => @silenced_account_ids }) if @options[:override_timestamps] || @status.within_realtime_window?
   end
 
   def find_existing_status
@@ -168,7 +168,7 @@ class ActivityPub::Activity::Create < ActivityPub::Activity
 
     return unless delivered_to_account.following?(@account)
 
-    FeedInsertWorker.perform_async(@status.id, delivered_to_account.id, :home)
+    FeedInsertWorker.perform_async(@status.id, delivered_to_account.id, 'home')
   end
 
   def delivered_to_account
diff --git a/app/lib/feed_manager.rb b/app/lib/feed_manager.rb
index c4dd9d00f..7840afee8 100644
--- a/app/lib/feed_manager.rb
+++ b/app/lib/feed_manager.rb
@@ -59,7 +59,7 @@ class FeedManager
     return false unless add_to_feed(:home, account.id, status, account.user&.aggregates_reblogs?)
 
     trim(:home, account.id)
-    PushUpdateWorker.perform_async(account.id, status.id, "timeline:#{account.id}", update: update) if push_update_required?("timeline:#{account.id}")
+    PushUpdateWorker.perform_async(account.id, status.id, "timeline:#{account.id}", { 'update' => update }) if push_update_required?("timeline:#{account.id}")
     true
   end
 
@@ -84,7 +84,7 @@ class FeedManager
     return false if filter_from_list?(status, list) || !add_to_feed(:list, list.id, status, list.account.user&.aggregates_reblogs?)
 
     trim(:list, list.id)
-    PushUpdateWorker.perform_async(list.account_id, status.id, "timeline:list:#{list.id}", update: update) if push_update_required?("timeline:list:#{list.id}")
+    PushUpdateWorker.perform_async(list.account_id, status.id, "timeline:list:#{list.id}", { 'update' => update }) if push_update_required?("timeline:list:#{list.id}")
     true
   end
 
diff --git a/app/models/admin/status_batch_action.rb b/app/models/admin/status_batch_action.rb
index 319deff98..85822214b 100644
--- a/app/models/admin/status_batch_action.rb
+++ b/app/models/admin/status_batch_action.rb
@@ -56,7 +56,7 @@ class Admin::StatusBatchAction
     end
 
     UserMailer.warning(target_account.user, @warning).deliver_later! if target_account.local?
-    RemovalWorker.push_bulk(status_ids) { |status_id| [status_id, preserve: target_account.local?, immediate: !target_account.local?] }
+    RemovalWorker.push_bulk(status_ids) { |status_id| [status_id, { 'preserve' => target_account.local?, 'immediate' => !target_account.local? }] }
   end
 
   def handle_report!
diff --git a/app/models/form/account_batch.rb b/app/models/form/account_batch.rb
index 4bf1775bb..dcf155840 100644
--- a/app/models/form/account_batch.rb
+++ b/app/models/form/account_batch.rb
@@ -103,7 +103,7 @@ class Form::AccountBatch
     authorize(account.user, :reject?)
     log_action(:reject, account.user, username: account.username)
     account.suspend!(origin: :local)
-    AccountDeletionWorker.perform_async(account.id, reserve_username: false)
+    AccountDeletionWorker.perform_async(account.id, { 'reserve_username' => false })
   end
 
   def suspend_account(account)
diff --git a/app/services/account_statuses_cleanup_service.rb b/app/services/account_statuses_cleanup_service.rb
index cbadecc63..3918b5ba4 100644
--- a/app/services/account_statuses_cleanup_service.rb
+++ b/app/services/account_statuses_cleanup_service.rb
@@ -15,7 +15,7 @@ class AccountStatusesCleanupService < BaseService
 
     account_policy.statuses_to_delete(budget, cutoff_id, account_policy.last_inspected).reorder(nil).find_each(order: :asc) do |status|
       status.discard
-      RemovalWorker.perform_async(status.id, redraft: false)
+      RemovalWorker.perform_async(status.id, { 'redraft' => false })
       num_deleted += 1
       last_deleted = status.id
     end
diff --git a/app/services/activitypub/process_status_update_service.rb b/app/services/activitypub/process_status_update_service.rb
index e22ea1ab6..977928127 100644
--- a/app/services/activitypub/process_status_update_service.rb
+++ b/app/services/activitypub/process_status_update_service.rb
@@ -266,7 +266,7 @@ class ActivityPub::ProcessStatusUpdateService < BaseService
   end
 
   def broadcast_updates!
-    ::DistributionWorker.perform_async(@status.id, update: true)
+    ::DistributionWorker.perform_async(@status.id, { 'update' => true })
   end
 
   def queue_poll_notifications!
diff --git a/app/services/fan_out_on_write_service.rb b/app/services/fan_out_on_write_service.rb
index 3a2e82b6d..4f847e293 100644
--- a/app/services/fan_out_on_write_service.rb
+++ b/app/services/fan_out_on_write_service.rb
@@ -59,7 +59,7 @@ class FanOutOnWriteService < BaseService
   def notify_mentioned_accounts!
     @status.active_mentions.where.not(id: @options[:silenced_account_ids] || []).joins(:account).merge(Account.local).select(:id, :account_id).reorder(nil).find_in_batches do |mentions|
       LocalNotificationWorker.push_bulk(mentions) do |mention|
-        [mention.account_id, mention.id, 'Mention', :mention]
+        [mention.account_id, mention.id, 'Mention', 'mention']
       end
     end
   end
@@ -67,7 +67,7 @@ class FanOutOnWriteService < BaseService
   def deliver_to_all_followers!
     @account.followers_for_local_distribution.select(:id).reorder(nil).find_in_batches do |followers|
       FeedInsertWorker.push_bulk(followers) do |follower|
-        [@status.id, follower.id, :home, update: update?]
+        [@status.id, follower.id, 'home', { 'update' => update? }]
       end
     end
   end
@@ -75,7 +75,7 @@ class FanOutOnWriteService < BaseService
   def deliver_to_lists!
     @account.lists_for_local_distribution.select(:id).reorder(nil).find_in_batches do |lists|
       FeedInsertWorker.push_bulk(lists) do |list|
-        [@status.id, list.id, :list, update: update?]
+        [@status.id, list.id, 'list', { 'update' => update? }]
       end
     end
   end
@@ -83,7 +83,7 @@ class FanOutOnWriteService < BaseService
   def deliver_to_mentioned_followers!
     @status.mentions.joins(:account).merge(@account.followers_for_local_distribution).select(:id, :account_id).reorder(nil).find_in_batches do |mentions|
       FeedInsertWorker.push_bulk(mentions) do |mention|
-        [@status.id, mention.account_id, :home, update: update?]
+        [@status.id, mention.account_id, 'home', { 'update' => update? }]
       end
     end
   end
diff --git a/app/services/follow_service.rb b/app/services/follow_service.rb
index 329262cca..ed28e1371 100644
--- a/app/services/follow_service.rb
+++ b/app/services/follow_service.rb
@@ -68,7 +68,7 @@ class FollowService < BaseService
     follow_request = @source_account.request_follow!(@target_account, reblogs: @options[:reblogs], notify: @options[:notify], rate_limit: @options[:with_rate_limit], bypass_limit: @options[:bypass_limit])
 
     if @target_account.local?
-      LocalNotificationWorker.perform_async(@target_account.id, follow_request.id, follow_request.class.name, :follow_request)
+      LocalNotificationWorker.perform_async(@target_account.id, follow_request.id, follow_request.class.name, 'follow_request')
     elsif @target_account.activitypub?
       ActivityPub::DeliveryWorker.perform_async(build_json(follow_request), @source_account.id, @target_account.inbox_url)
     end
@@ -79,7 +79,7 @@ class FollowService < BaseService
   def direct_follow!
     follow = @source_account.follow!(@target_account, reblogs: @options[:reblogs], notify: @options[:notify], rate_limit: @options[:with_rate_limit], bypass_limit: @options[:bypass_limit])
 
-    LocalNotificationWorker.perform_async(@target_account.id, follow.id, follow.class.name, :follow)
+    LocalNotificationWorker.perform_async(@target_account.id, follow.id, follow.class.name, 'follow')
     MergeWorker.perform_async(@target_account.id, @source_account.id)
 
     follow
diff --git a/app/services/import_service.rb b/app/services/import_service.rb
index 74ad5b79f..8e6640b9d 100644
--- a/app/services/import_service.rb
+++ b/app/services/import_service.rb
@@ -76,7 +76,7 @@ class ImportService < BaseService
         if presence_hash[target_account.acct]
           items.delete(target_account.acct)
           extra = presence_hash[target_account.acct][1]
-          Import::RelationshipWorker.perform_async(@account.id, target_account.acct, action, extra)
+          Import::RelationshipWorker.perform_async(@account.id, target_account.acct, action, extra.stringify_keys)
         else
           Import::RelationshipWorker.perform_async(@account.id, target_account.acct, undo_action)
         end
@@ -87,7 +87,7 @@ class ImportService < BaseService
     tail_items = items - head_items
 
     Import::RelationshipWorker.push_bulk(head_items + tail_items) do |acct, extra|
-      [@account.id, acct, action, extra]
+      [@account.id, acct, action, extra.stringify_keys]
     end
   end
 
diff --git a/app/services/reblog_service.rb b/app/services/reblog_service.rb
index ece91847a..2d1265f10 100644
--- a/app/services/reblog_service.rb
+++ b/app/services/reblog_service.rb
@@ -47,7 +47,7 @@ class ReblogService < BaseService
     reblogged_status = reblog.reblog
 
     if reblogged_status.account.local?
-      LocalNotificationWorker.perform_async(reblogged_status.account_id, reblog.id, reblog.class.name, :reblog)
+      LocalNotificationWorker.perform_async(reblogged_status.account_id, reblog.id, reblog.class.name, 'reblog')
     elsif reblogged_status.account.activitypub? && !reblogged_status.account.following?(reblog.account)
       ActivityPub::DeliveryWorker.perform_async(build_json(reblog), reblog.account_id, reblogged_status.account.inbox_url)
     end
diff --git a/app/services/resolve_account_service.rb b/app/services/resolve_account_service.rb
index b266c019e..3a372ef2a 100644
--- a/app/services/resolve_account_service.rb
+++ b/app/services/resolve_account_service.rb
@@ -143,7 +143,7 @@ class ResolveAccountService < BaseService
 
   def queue_deletion!
     @account.suspend!(origin: :remote)
-    AccountDeletionWorker.perform_async(@account.id, reserve_username: false, skip_activitypub: true)
+    AccountDeletionWorker.perform_async(@account.id, { 'reserve_username' => false, 'skip_activitypub' => true })
   end
 
   def lock_options
diff --git a/app/workers/activitypub/distribution_worker.rb b/app/workers/activitypub/distribution_worker.rb
index 17c108461..575e11025 100644
--- a/app/workers/activitypub/distribution_worker.rb
+++ b/app/workers/activitypub/distribution_worker.rb
@@ -27,6 +27,6 @@ class ActivityPub::DistributionWorker < ActivityPub::RawDistributionWorker
   end
 
   def options
-    { synchronize_followers: @status.private_visibility? }
+    { 'synchronize_followers' => @status.private_visibility? }
   end
 end
diff --git a/app/workers/feed_insert_worker.rb b/app/workers/feed_insert_worker.rb
index 0122be95d..6e3472d57 100644
--- a/app/workers/feed_insert_worker.rb
+++ b/app/workers/feed_insert_worker.rb
@@ -3,7 +3,7 @@
 class FeedInsertWorker
   include Sidekiq::Worker
 
-  def perform(status_id, id, type = :home, options = {})
+  def perform(status_id, id, type = 'home', options = {})
     @type      = type.to_sym
     @status    = Status.find(status_id)
     @options   = options.symbolize_keys
diff --git a/app/workers/scheduler/user_cleanup_scheduler.rb b/app/workers/scheduler/user_cleanup_scheduler.rb
index d06b637f9..750d2127b 100644
--- a/app/workers/scheduler/user_cleanup_scheduler.rb
+++ b/app/workers/scheduler/user_cleanup_scheduler.rb
@@ -29,7 +29,7 @@ class Scheduler::UserCleanupScheduler
   def clean_discarded_statuses!
     Status.discarded.where('deleted_at <= ?', 30.days.ago).find_in_batches do |statuses|
       RemovalWorker.push_bulk(statuses) do |status|
-        [status.id, { immediate: true }]
+        [status.id, { 'immediate' => true }]
       end
     end
   end
diff --git a/config/environments/test.rb b/config/environments/test.rb
index a35cadcfa..ef3cb2e48 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -70,3 +70,6 @@ if ENV['PAM_ENABLED'] == 'true'
       env: { email: 'pam@example.com' }
     }
 end
+
+# Catch serialization warnings early
+Sidekiq.strict_args!