diff --git a/Gemfile.lock b/Gemfile.lock
index c60465a..51cd933 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -7,7 +7,7 @@ PATH
       http_parser.rb (~> 0.6.0)
       msgpack (~> 1.4.2)
       polyphony (~> 0.64)
-      qeweney (~> 0.10.0)
+      qeweney (~> 0.11)
       rack (>= 2.0.8, < 2.3.0)
       websocket (~> 1.2.8)
 
@@ -52,7 +52,7 @@ GEM
     msgpack (1.4.2)
     multipart-post (2.1.1)
     polyphony (0.64)
-    qeweney (0.10)
+    qeweney (0.11)
       escape_utils (~> 1.2.1)
     rack (2.2.3)
     rake (12.3.3)
diff --git a/lib/tipi/rack_adapter.rb b/lib/tipi/rack_adapter.rb
index 1dec531..ebb45ff 100644
--- a/lib/tipi/rack_adapter.rb
+++ b/lib/tipi/rack_adapter.rb
@@ -3,25 +3,7 @@
 require 'rack'
 
 module Tipi
-  module RackAdapter
-    # Implements a rack input stream:
-    # https://www.rubydoc.info/github/rack/rack/master/file/SPEC#label-The+Input+Stream
-    class InputStream
-      def initialize(request)
-        @request = request
-      end
-      
-      def gets; end
-      
-      def read(length = nil, outbuf = nil); end
-      
-      def each(&block)
-        @request.each_chunk(&block)
-      end
-      
-      def rewind; end
-    end
-    
+  module RackAdapter    
     class << self
       def run(app)
         ->(req) { respond(req, app.(env(req))) }
@@ -32,41 +14,8 @@ def load(path)
         instance_eval(src, path, 1)
       end
 
-      RACK_ENV = {
-        'SCRIPT_NAME'                    => '',
-        'rack.version'                   => Rack::VERSION,
-        'SERVER_PORT'                    => '80', # ?
-        'rack.url_scheme'                => 'http', # ?
-        'rack.errors'                    => STDERR, # ?
-        'rack.multithread'               => false,
-        'rack.run_once'                  => false,
-        'rack.hijack?'                   => false,
-        'rack.hijack'                    => nil,
-        'rack.hijack_io'                 => nil,
-        'rack.session'                   => nil,
-        'rack.logger'                    => nil,
-        'rack.multipart.buffer_size'     => nil,
-        'rack.multipar.tempfile_factory' => nil
-      }
-      
       def env(request)
-        Hash.new do |h, k|
-          h[k] = env_value_from_request(request, k)
-        end
-      end
-
-      HTTP_HEADER_RE = /^HTTP_(.+)$/.freeze
-
-      def env_value_from_request(request, key)
-        case key
-        when 'REQUEST_METHOD' then request.method
-        when 'PATH_INFO'      then request.path
-        when 'QUERY_STRING'   then request.query_string || ''
-        when 'SERVER_NAME'    then request.headers['host']
-        when 'rack.input'     then InputStream.new(request)
-        when HTTP_HEADER_RE   then request.headers[$1.downcase]
-        else                       RACK_ENV[key]
-        end
+        Qeweney.rack_env_from_request(request)
       end
 
       def respond(request, (status_code, headers, body))
diff --git a/tipi.gemspec b/tipi.gemspec
index 25c638f..18e9e22 100644
--- a/tipi.gemspec
+++ b/tipi.gemspec
@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
   s.executables   = ['tipi']
 
   s.add_runtime_dependency      'polyphony',          '~>0.64'
-  s.add_runtime_dependency      'qeweney',            '~>0.10.0'
+  s.add_runtime_dependency      'qeweney',            '~>0.11'
   
   s.add_runtime_dependency      'http_parser.rb',     '~>0.6.0'
   s.add_runtime_dependency      'http-2',             '~>0.10.0'