diff --git a/app/services/send_interaction_service.rb b/app/services/send_interaction_service.rb
index c11813abc673b404455162abd7e0054c653559d7..af205c9c9dfac3dad5a7a8a9d76b23b8e1232c71 100644
--- a/app/services/send_interaction_service.rb
+++ b/app/services/send_interaction_service.rb
@@ -12,7 +12,7 @@ class SendInteractionService < BaseService
 
     return if !target_account.ostatus? || block_notification?
 
-    delivery = build_request.perform
+    delivery = build_request.perform.flush
 
     raise Mastodon::UnexpectedResponseError, delivery unless delivery.code > 199 && delivery.code < 300
   end
diff --git a/app/services/subscribe_service.rb b/app/services/subscribe_service.rb
index bfa7ff8c8e83b35a7027fd771a008f9b09717c09..2d8af0203002c0462ca01ccd7a2c627e7e4d592e 100644
--- a/app/services/subscribe_service.rb
+++ b/app/services/subscribe_service.rb
@@ -6,7 +6,7 @@ class SubscribeService < BaseService
 
     @account        = account
     @account.secret = SecureRandom.hex
-    @response       = build_request.perform
+    @response       = build_request.perform.flush
 
     if response_failed_permanently?
       # We're not allowed to subscribe. Fail and move on.
diff --git a/app/services/unsubscribe_service.rb b/app/services/unsubscribe_service.rb
index b99046712c7a8fe6186365c48ce2c70fba997c68..d84a5a530d815cf87c4e18e8585783f929e4edfa 100644
--- a/app/services/unsubscribe_service.rb
+++ b/app/services/unsubscribe_service.rb
@@ -7,7 +7,7 @@ class UnsubscribeService < BaseService
     @account = account
 
     begin
-      @response = build_request.perform
+      @response = build_request.perform.flush
 
       Rails.logger.debug "PuSH unsubscribe for #{@account.acct} failed: #{@response.status}" unless @response.status.success?
     rescue HTTP::Error, OpenSSL::SSL::SSLError => e
diff --git a/app/workers/activitypub/delivery_worker.rb b/app/workers/activitypub/delivery_worker.rb
index a4e829343485dfa67b87b84fcce7d2e57833174a..059c328134fb537c5573f2ffafc714acb5431c07 100644
--- a/app/workers/activitypub/delivery_worker.rb
+++ b/app/workers/activitypub/delivery_worker.rb
@@ -28,7 +28,7 @@ class ActivityPub::DeliveryWorker
   end
 
   def perform_request
-    @response = build_request.perform
+    @response = build_request.perform.flush
   end
 
   def response_successful?
diff --git a/app/workers/pubsubhubbub/delivery_worker.rb b/app/workers/pubsubhubbub/delivery_worker.rb
index 110b8bf16223b8115ccc048603664d2c07a09edb..c3506727b930d5175e04c460a4d8630a4c5d3514 100644
--- a/app/workers/pubsubhubbub/delivery_worker.rb
+++ b/app/workers/pubsubhubbub/delivery_worker.rb
@@ -37,7 +37,7 @@ class Pubsubhubbub::DeliveryWorker
   def callback_post_payload
     request = Request.new(:post, subscription.callback_url, body: payload)
     request.add_headers(headers)
-    request.perform
+    request.perform.flush
   end
 
   def blocked_domain?