diff --git a/async-http.gemspec b/async-http.gemspec
index ec72274..74b150e 100644
--- a/async-http.gemspec
+++ b/async-http.gemspec
@@ -29,7 +29,7 @@ Gem::Specification.new do |spec|
 	spec.add_dependency "io-endpoint", "~> 0.11"
 	spec.add_dependency "io-stream", "~> 0.4"
 	spec.add_dependency "protocol-http", "~> 0.28"
-	spec.add_dependency "protocol-http1", "~> 0.19"
+	spec.add_dependency "protocol-http1", "~> 0.20"
 	spec.add_dependency "protocol-http2", "~> 0.18"
 	spec.add_dependency "traces", ">= 0.10"
 end
diff --git a/lib/async/http/protocol/http1/server.rb b/lib/async/http/protocol/http1/server.rb
index 24ed951..b7acbcf 100644
--- a/lib/async/http/protocol/http1/server.rb
+++ b/lib/async/http/protocol/http1/server.rb
@@ -35,13 +35,9 @@ def next_request
 						end
 						
 						return request
-					rescue Async::TimeoutError, IO::TimeoutError
-						# For an interesting discussion about this behaviour, see https://trac.nginx.org/nginx/ticket/1005
-						# If you enable this, you will see some spec failures...
-						# fail_request(408)
-						raise
-					rescue
+					rescue ::Protocol::HTTP1::BadRequest
 						fail_request(400)
+						# Conceivably we could retry here, but we don't really know how bad the error is, so it's better to just fail:
 						raise
 					end