diff --git a/async-http.gemspec b/async-http.gemspec
index 9fc07541..bccc51c6 100644
--- a/async-http.gemspec
+++ b/async-http.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
 	spec.add_dependency("async", "~> 1.14")
 	spec.add_dependency("async-io", "~> 1.18")
 	
-	spec.add_dependency("http-protocol", "~> 0.15")
+	spec.add_dependency("http-protocol", "~> 0.17")
 	
 	# spec.add_dependency("openssl")
 	
diff --git a/lib/async/http/protocol/http1/connection.rb b/lib/async/http/protocol/http1/connection.rb
index 50a3da43..f1a4a4c4 100755
--- a/lib/async/http/protocol/http1/connection.rb
+++ b/lib/async/http/protocol/http1/connection.rb
@@ -44,7 +44,7 @@ def read_line
 					end
 					
 					# @return [Async::Wrapper] the underlying non-blocking IO.
-					def hijack
+					def hijack!
 						@persistent = false
 						
 						@stream.flush
diff --git a/lib/async/http/protocol/http1/request.rb b/lib/async/http/protocol/http1/request.rb
index b66a0138..4f7bbd4d 100644
--- a/lib/async/http/protocol/http1/request.rb
+++ b/lib/async/http/protocol/http1/request.rb
@@ -35,8 +35,8 @@ def hijack?
 						true
 					end
 					
-					def hijack
-						@protocol.hijack
+					def hijack!
+						@protocol.hijack!
 					end
 				end
 			end
diff --git a/spec/async/http/protocol/http11_spec.rb b/spec/async/http/protocol/http11_spec.rb
index 04745ef5..dcc0a54f 100755
--- a/spec/async/http/protocol/http11_spec.rb
+++ b/spec/async/http/protocol/http11_spec.rb
@@ -50,7 +50,7 @@
 		
 		let(:server) do
 			Async::HTTP::Server.for(endpoint, protocol) do |request|
-				peer = request.hijack
+				peer = request.hijack!
 				
 				peer.write(
 					"#{request.version} 200 It worked!\r\n" +
diff --git a/spec/async/http/protocol/shared_examples.rb b/spec/async/http/protocol/shared_examples.rb
index cb950120..011886ce 100644
--- a/spec/async/http/protocol/shared_examples.rb
+++ b/spec/async/http/protocol/shared_examples.rb
@@ -199,7 +199,7 @@
 		let(:server) do
 			Async::HTTP::Server.for(endpoint, protocol) do |request|
 				if request.hijack?
-					io = request.hijack
+					io = request.hijack!
 					io.write "HTTP/1.1 200 Okay\r\nContent-Length: 16\r\n\r\nHijack Succeeded"
 					io.flush
 					io.close