diff --git a/lib/sus/fixtures/async/http/server_context.rb b/lib/sus/fixtures/async/http/server_context.rb
index 3620dfb..9a5938b 100644
--- a/lib/sus/fixtures/async/http/server_context.rb
+++ b/lib/sus/fixtures/async/http/server_context.rb
@@ -126,7 +126,7 @@ def before
 					@client = make_client(@client_endpoint)
 				end
 				
-				def after
+				def after(error = nil)
 					# We add a timeout here, to avoid hanging in `@client.close`:
 					::Async::Task.current.with_timeout(1) do
 						@client&.close
diff --git a/sus-fixtures-async-http.gemspec b/sus-fixtures-async-http.gemspec
index d273500..3b7592e 100644
--- a/sus-fixtures-async-http.gemspec
+++ b/sus-fixtures-async-http.gemspec
@@ -26,6 +26,6 @@ Gem::Specification.new do |spec|
 	spec.required_ruby_version = ">= 3.1"
 	
 	spec.add_dependency "async-http", "~> 0.54"
-	spec.add_dependency "sus", "~> 0.10"
+	spec.add_dependency "sus", "~> 0.31"
 	spec.add_dependency "sus-fixtures-async", "~> 0.1"
 end