diff --git a/lib/cgi/session.rb b/lib/cgi/session.rb
index 63c5003..2420900 100644
--- a/lib/cgi/session.rb
+++ b/lib/cgi/session.rb
@@ -156,7 +156,7 @@ class CGI
     attr_reader :session_id, :new_session
 
     def Session::callback(dbman)  #:nodoc:
-      Proc.new{
+      proc {
         dbman[0].close unless dbman.empty?
       }
     end
diff --git a/lib/irb/ruby-lex.rb b/lib/irb/ruby-lex.rb
index ac4afa2..849420c 100644
--- a/lib/irb/ruby-lex.rb
+++ b/lib/irb/ruby-lex.rb
@@ -82,7 +82,7 @@ class RubyLex
     elsif block_given?
       @input = block
     else
-      @input = Proc.new{@io.gets}
+      @input = proc { @io.gets }
     end
   end
 
@@ -197,7 +197,7 @@ class RubyLex
     if p.respond_to?(:call)
       @prompt = p
     else
-      @prompt = Proc.new{print p}
+      @prompt = proc { print p }
     end
   end
 
@@ -352,7 +352,7 @@ class RubyLex
     end
 
     @OP.def_rule("=begin",
-                 proc{|op, io| @prev_char_no == 0 && peek(0) =~ /\s/}) do
+                 proc { |op, io| @prev_char_no == 0 && peek(0) =~ /\s/ }) do
       |op, io|
       @ltype = "="
       until getc == "\n"; end
@@ -471,13 +471,13 @@ class RubyLex
       Token(TkOPASGN, $1)
     end
 
-    @OP.def_rule("+@", proc{|op, io| @lex_state == EXPR_FNAME}) do
+    @OP.def_rule("+@", proc { |op, io| @lex_state == EXPR_FNAME }) do
       |op, io|
       @lex_state = EXPR_ARG
       Token(op)
     end
 
-    @OP.def_rule("-@", proc{|op, io| @lex_state == EXPR_FNAME}) do
+    @OP.def_rule("-@", proc { |op, io| @lex_state == EXPR_FNAME }) do
       |op, io|
       @lex_state = EXPR_ARG
       Token(op)
@@ -599,7 +599,7 @@ class RubyLex
       Token("~")
     end
 
-    @OP.def_rule("~@", proc{|op, io| @lex_state == EXPR_FNAME}) do
+    @OP.def_rule("~@", proc { |op, io| @lex_state == EXPR_FNAME }) do
       |op, io|
       @lex_state = EXPR_BEG
       Token("~")
@@ -619,13 +619,13 @@ class RubyLex
       Token(tk_c)
     end
 
-    @OP.def_rule("[]", proc{|op, io| @lex_state == EXPR_FNAME}) do
+    @OP.def_rule("[]", proc { |op, io| @lex_state == EXPR_FNAME }) do
       |op, io|
       @lex_state = EXPR_ARG
       Token("[]")
     end
 
-    @OP.def_rule("[]=", proc{|op, io| @lex_state == EXPR_FNAME}) do
+    @OP.def_rule("[]=", proc { |op, io| @lex_state == EXPR_FNAME }) do
       |op, io|
       @lex_state = EXPR_ARG
       Token("[]=")
diff --git a/lib/matrix.rb b/lib/matrix.rb
index 76bec92..81655ad 100644
--- a/lib/matrix.rb
+++ b/lib/matrix.rb
@@ -1109,7 +1109,7 @@ class Matrix
     size = row_count
     last = size - 1
     a = to_a
-    no_pivot = Proc.new{ return 0 }
+    no_pivot = proc { return 0 }
     sign = +1
     pivot = 1
     size.times do |k|
diff --git a/lib/rdoc/ruby_lex.rb b/lib/rdoc/ruby_lex.rb
index a51e4a9..8ada908 100644
--- a/lib/rdoc/ruby_lex.rb
+++ b/lib/rdoc/ruby_lex.rb
@@ -148,7 +148,7 @@ class RDoc::RubyLex
     elsif block_given?
       @input = block
     else
-      @input = Proc.new{@io.gets}
+      @input = proc { @io.gets }
     end
   end
 
@@ -265,7 +265,7 @@ class RDoc::RubyLex
     if p.respond_to?(:call)
       @prompt = p
     else
-      @prompt = Proc.new{print p}
+      @prompt = proc { print p }
     end
   end
 
@@ -430,7 +430,7 @@ class RDoc::RubyLex
     end
 
     @OP.def_rule("=begin",
-                 proc{|op, io| @prev_char_no == 0 && peek(0) =~ /\s/}) do
+                 proc { |op, io| @prev_char_no == 0 && peek(0) =~ /\s/ }) do
       |op, io|
       @ltype = "="
       res = ''
@@ -556,13 +556,13 @@ class RDoc::RubyLex
       Token(TkOPASGN, $1)
     end
 
-    @OP.def_rule("+@", proc{|op, io| @lex_state == :EXPR_FNAME}) do
+    @OP.def_rule("+@", proc { |op, io| @lex_state == :EXPR_FNAME }) do
       |op, io|
       @lex_state = :EXPR_ARG
       Token(op)
     end
 
-    @OP.def_rule("-@", proc{|op, io| @lex_state == :EXPR_FNAME}) do
+    @OP.def_rule("-@", proc { |op, io| @lex_state == :EXPR_FNAME }) do
       |op, io|
       @lex_state = :EXPR_ARG
       Token(op)
@@ -690,7 +690,7 @@ class RDoc::RubyLex
       Token("~")
     end
 
-    @OP.def_rule("~@", proc{|op, io| @lex_state == :EXPR_FNAME}) do
+    @OP.def_rule("~@", proc { |op, io| @lex_state == :EXPR_FNAME }) do
       |op, io|
       @lex_state = :EXPR_BEG
       Token("~")
@@ -710,13 +710,13 @@ class RDoc::RubyLex
       Token tk_c
     end
 
-    @OP.def_rule("[]", proc{|op, io| @lex_state == :EXPR_FNAME}) do
+    @OP.def_rule("[]", proc { |op, io| @lex_state == :EXPR_FNAME }) do
       |op, io|
       @lex_state = :EXPR_ARG
       Token("[]")
     end
 
-    @OP.def_rule("[]=", proc{|op, io| @lex_state == :EXPR_FNAME}) do
+    @OP.def_rule("[]=", proc { |op, io| @lex_state == :EXPR_FNAME }) do
       |op, io|
       @lex_state = :EXPR_ARG
       Token("[]=")
@@ -796,7 +796,7 @@ class RDoc::RubyLex
       end
     end
 
-    #       @OP.def_rule("def", proc{|op, io| /\s/ =~ io.peek(0)}) do
+    #       @OP.def_rule("def", proc { |op, io| /\s/ =~ io.peek(0) }) do
     # 	|op, io|
     # 	@indent += 1
     # 	@lex_state = :EXPR_FNAME
diff --git a/lib/rss/0.9.rb b/lib/rss/0.9.rb
index 77b2de1..fa4252a 100644
--- a/lib/rss/0.9.rb
+++ b/lib/rss/0.9.rb
@@ -450,7 +450,7 @@ module RSS
       @rss.do_validate = @do_validate
       @rss.xml_stylesheets = @xml_stylesheets
       @last_element = @rss
-      pr = Proc.new do |text, tags|
+      pr = proc do |text, tags|
         @rss.validate_for_stream(tags, @ignore_unknown_element) if @do_validate
       end
       @proc_stack.push(pr)
diff --git a/lib/rss/1.0.rb b/lib/rss/1.0.rb
index a2d88d4..744061c 100644
--- a/lib/rss/1.0.rb
+++ b/lib/rss/1.0.rb
@@ -474,7 +474,7 @@ module RSS
       @rss.do_validate = @do_validate
       @rss.xml_stylesheets = @xml_stylesheets
       @last_element = @rss
-      pr = Proc.new do |text, tags|
+      pr = proc do |text, tags|
         @rss.validate_for_stream(tags, @ignore_unknown_element) if @do_validate
       end
       @proc_stack.push(pr)
diff --git a/lib/rss/atom.rb b/lib/rss/atom.rb
index d352423..8133f72 100644
--- a/lib/rss/atom.rb
+++ b/lib/rss/atom.rb
@@ -815,7 +815,7 @@ module RSS
       @rss.lang = attrs["xml:lang"]
       @rss.base = attrs["xml:base"]
       @last_element = @rss
-      pr = Proc.new do |text, tags|
+      pr = proc do |text, tags|
         @rss.validate_for_stream(tags) if @do_validate
       end
       @proc_stack.push(pr)
@@ -830,7 +830,7 @@ module RSS
       @rss.lang = attrs["xml:lang"]
       @rss.base = attrs["xml:base"]
       @last_element = @rss
-      pr = Proc.new do |text, tags|
+      pr = proc do |text, tags|
         @rss.validate_for_stream(tags) if @do_validate
       end
       @proc_stack.push(pr)
diff --git a/lib/rss/maker/base.rb b/lib/rss/maker/base.rb
index d1586fb..6f939d9 100644
--- a/lib/rss/maker/base.rb
+++ b/lib/rss/maker/base.rb
@@ -501,7 +501,7 @@ module RSS
       end
 
       [
-       ["link", "href", Proc.new {|target,| "#{target}.href = 'self'"}],
+       ["link", "href", proc { |target| "#{target}.href = 'self'" }],
        ["author", "name"],
        ["contributor", "name"],
       ].each do |name, attribute, additional_setup_maker|
@@ -715,7 +715,7 @@ module RSS
 
         [
          ["author", "name"],
-         ["link", "href", Proc.new {|target,| "#{target}.href = 'alternate'"}],
+         ["link", "href", proc { |target| "#{target}.href = 'alternate'" }],
          ["contributor", "name"],
         ].each do |name, attribute|
           def_classed_elements(name, attribute)
diff --git a/lib/rss/parser.rb b/lib/rss/parser.rb
index 1b6e4e9..86e383c 100644
--- a/lib/rss/parser.rb
+++ b/lib/rss/parser.rb
@@ -327,7 +327,7 @@ module RSS
                                         element_attrs)
         previous << next_element if previous
         @last_xml_element = next_element
-        pr = Proc.new do |text, tags|
+        pr = proc do |text, tags|
           if previous
             @last_xml_element = previous
           else
@@ -444,7 +444,7 @@ module RSS
     end
 
     def start_get_text_element(tag_name, prefix, ns, required_uri)
-      pr = Proc.new do |text, tags|
+      pr = proc do |text, tags|
         setter = self.class.setter(required_uri, tag_name)
         if setter and @last_element.respond_to?(setter)
           if @do_validate
@@ -515,7 +515,7 @@ module RSS
       @last_element.parent = previous if klass.need_parent?
       @xml_child_mode = @last_element.have_xml_content?
 
-      Proc.new do |text, tags|
+      proc do |text, tags|
         p(@last_element.class) if DEBUG
         if @xml_child_mode
           @last_element.content = @xml_element.to_s
@@ -540,7 +540,7 @@ module RSS
 
     def setup_next_element_in_unknown_element
       current_element, @last_element = @last_element, nil
-      Proc.new {@last_element = current_element}
+      proc { @last_element = current_element }
     end
   end
 
diff --git a/lib/webrick/httprequest.rb b/lib/webrick/httprequest.rb
index 21933ac..f54f731 100644
--- a/lib/webrick/httprequest.rb
+++ b/lib/webrick/httprequest.rb
@@ -251,7 +251,7 @@ module WEBrick
     # Returns the request body.
 
     def body(&block) # :yields: body_chunk
-      block ||= Proc.new{|chunk| @body << chunk }
+      block ||= proc { |chunk| @body << chunk }
       read_body(@socket, block)
       @body.empty? ? nil : @body
     end