diff --git a/ruby-2.1.0-Allow-to-specify-additional-preludes-by-configuratio.patch b/ruby-2.1.0-Allow-to-specify-additional-preludes-by-configuratio.patch
index 9dbfd39..681ccf2 100644
--- a/ruby-2.1.0-Allow-to-specify-additional-preludes-by-configuratio.patch
+++ b/ruby-2.1.0-Allow-to-specify-additional-preludes-by-configuratio.patch
@@ -13,9 +13,9 @@ diff --git a/Makefile.in b/Makefile.in
 index 7e8ed82..7916993 100644
 --- a/Makefile.in
 +++ b/Makefile.in
-@@ -143,6 +143,8 @@ XRUBY_RUBYLIBDIR = @XRUBY_RUBYLIBDIR@
- XRUBY_RUBYHDRDIR = @XRUBY_RUBYHDRDIR@
- BOOTSTRAPRUBY = @BOOTSTRAPRUBY@
+@@ -146,6 +146,8 @@ BOOTSTRAPRUBY = @BOOTSTRAPRUBY@
+ COROUTINE_H = @X_FIBER_COROUTINE_H@
+ COROUTINE_OBJ = $(COROUTINE_H:.h=.@OBJEXT@)
  
 +OPTIONAL_PRELUDES = @OPTIONAL_PRELUDES@
 +
@@ -26,7 +26,7 @@ diff --git a/common.mk b/common.mk
 index 5cfbc3d..3f0a82e 100644
 --- a/common.mk
 +++ b/common.mk
-@@ -154,7 +154,7 @@ ALLOBJS       = $(NORMALMAINOBJ) $(MINIOBJS) $(COMMONOBJS) $(INITOBJS)
+@@ -155,7 +155,7 @@ ALLOBJS       = $(NORMALMAINOBJ) $(MINIOBJS) $(COMMONOBJS) $(INITOBJS)
  GOLFOBJS      = goruby.$(OBJEXT) golf_prelude.$(OBJEXT)
  
  DEFAULT_PRELUDES = $(GEM_PRELUDE)
@@ -39,7 +39,7 @@ diff --git a/configure.ac b/configure.ac
 index 028ef7ca3e..cdeff87871 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -3816,6 +3816,13 @@ AC_SUBST(rubyarchhdrdir)dnl
+@@ -3860,6 +3860,13 @@ AC_SUBST(rubyarchhdrdir)dnl
  AC_SUBST(sitearchhdrdir)dnl
  AC_SUBST(vendorarchhdrdir)dnl
  
diff --git a/ruby-2.1.0-Enable-configuration-of-archlibdir.patch b/ruby-2.1.0-Enable-configuration-of-archlibdir.patch
index dc041f1..b199fd8 100644
--- a/ruby-2.1.0-Enable-configuration-of-archlibdir.patch
+++ b/ruby-2.1.0-Enable-configuration-of-archlibdir.patch
@@ -11,7 +11,7 @@ diff --git a/configure.ac b/configure.ac
 index 11fc237552..b77e88fc37 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -3046,6 +3046,11 @@ AS_IF([test ${multiarch+set}], [
+@@ -3090,6 +3090,11 @@ AS_IF([test ${multiarch+set}], [
  ])
  
  archlibdir='${libdir}/${arch}'
diff --git a/ruby-2.1.0-Prevent-duplicated-paths-when-empty-version-string-i.patch b/ruby-2.1.0-Prevent-duplicated-paths-when-empty-version-string-i.patch
index 22955e9..4050927 100644
--- a/ruby-2.1.0-Prevent-duplicated-paths-when-empty-version-string-i.patch
+++ b/ruby-2.1.0-Prevent-duplicated-paths-when-empty-version-string-i.patch
@@ -14,7 +14,7 @@ diff --git a/configure.ac b/configure.ac
 index 999e2d6d5d..11fc237552 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -3671,7 +3671,8 @@ AS_CASE(["$ruby_version_dir_name"],
+@@ -3715,7 +3715,8 @@ AS_CASE(["$ruby_version_dir_name"],
  ruby_version_dir=/'${ruby_version_dir_name}'
  
  if test -z "${ruby_version_dir_name}"; then
diff --git a/ruby-2.1.0-always-use-i386.patch b/ruby-2.1.0-always-use-i386.patch
index 38263cb..9b5ce56 100644
--- a/ruby-2.1.0-always-use-i386.patch
+++ b/ruby-2.1.0-always-use-i386.patch
@@ -11,7 +11,7 @@ diff --git a/configure.ac b/configure.ac
 index b77e88fc37..6bba453e3c 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -3735,6 +3735,8 @@ AC_SUBST(vendorarchdir)dnl
+@@ -3779,6 +3779,8 @@ AC_SUBST(vendorarchdir)dnl
  AC_SUBST(CONFIGURE, "`echo $0 | sed 's|.*/||'`")dnl
  AC_SUBST(configure_args, "`echo "${ac_configure_args}" | sed 's/\\$/$$/g'`")dnl
  
diff --git a/ruby-2.1.0-custom-rubygems-location.patch b/ruby-2.1.0-custom-rubygems-location.patch
index 134f75b..bb63e1d 100644
--- a/ruby-2.1.0-custom-rubygems-location.patch
+++ b/ruby-2.1.0-custom-rubygems-location.patch
@@ -15,7 +15,7 @@ diff --git a/configure.ac b/configure.ac
 index 6bba453e3c..028ef7ca3e 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -3707,6 +3707,10 @@ AC_ARG_WITH(vendorarchdir,
+@@ -3751,6 +3751,10 @@ AC_ARG_WITH(vendorarchdir,
              [vendorarchdir=$withval],
              [vendorarchdir=${multiarch+'${rubysitearchprefix}/vendor_ruby'${ruby_version_dir}}${multiarch-'${vendorlibdir}/${sitearch}'}])
  
@@ -26,7 +26,7 @@ index 6bba453e3c..028ef7ca3e 100644
  AS_IF([test "${LOAD_RELATIVE+set}"], [
      AC_DEFINE_UNQUOTED(LOAD_RELATIVE, $LOAD_RELATIVE)
      RUBY_EXEC_PREFIX=''
-@@ -3731,6 +3735,7 @@ AC_SUBST(sitearchdir)dnl
+@@ -3775,6 +3779,7 @@ AC_SUBST(sitearchdir)dnl
  AC_SUBST(vendordir)dnl
  AC_SUBST(vendorlibdir)dnl
  AC_SUBST(vendorarchdir)dnl
@@ -75,7 +75,7 @@ index b47b6e1..0b99408 100755
  mandir = CONFIG["mandir", true]
  docdir = CONFIG["docdir", true]
  enable_shared = CONFIG["ENABLE_SHARED"] == 'yes'
-@@ -558,7 +559,13 @@ def stub
+@@ -560,7 +561,13 @@ def stub
  install?(:local, :comm, :lib) do
    prepare "library scripts", rubylibdir
    noinst = %w[*.txt *.rdoc *.gemspec]
diff --git a/ruby-2.2.3-Generate-preludes-using-miniruby.patch b/ruby-2.2.3-Generate-preludes-using-miniruby.patch
index 70f5fcd..554d9c7 100644
--- a/ruby-2.2.3-Generate-preludes-using-miniruby.patch
+++ b/ruby-2.2.3-Generate-preludes-using-miniruby.patch
@@ -11,7 +11,7 @@ diff --git a/common.mk b/common.mk
 index 168dc52..20c218a 100644
 --- a/common.mk
 +++ b/common.mk
-@@ -1020,9 +1020,9 @@ $(MINIPRELUDE_C): $(COMPILE_PRELUDE)
+@@ -1032,9 +1032,9 @@ $(MINIPRELUDE_C): $(COMPILE_PRELUDE)
  		$(srcdir)/template/prelude.c.tmpl
  
  $(PRELUDE_C): $(COMPILE_PRELUDE) \
diff --git a/ruby-2.3.0-ruby_version.patch b/ruby-2.3.0-ruby_version.patch
index 52e3b3b..2b48fc8 100644
--- a/ruby-2.3.0-ruby_version.patch
+++ b/ruby-2.3.0-ruby_version.patch
@@ -20,7 +20,7 @@ diff --git a/configure.ac b/configure.ac
 index 8ea969412f..a00f2b6776 100644
 --- a/configure.ac
 +++ b/configure.ac
-@@ -3622,9 +3622,6 @@ AS_CASE(["$target_os"],
+@@ -3666,9 +3666,6 @@ AS_CASE(["$target_os"],
      rubyw_install_name='$(RUBYW_INSTALL_NAME)'
      ])
  
@@ -30,7 +30,7 @@ index 8ea969412f..a00f2b6776 100644
  rubyarchprefix=${multiarch+'${archlibdir}/${RUBY_BASE_NAME}'}${multiarch-'${rubylibprefix}/${arch}'}
  AC_ARG_WITH(rubyarchprefix,
  	    AS_HELP_STRING([--with-rubyarchprefix=DIR],
-@@ -3647,56 +3644,62 @@ AC_ARG_WITH(ridir,
+@@ -3691,56 +3688,62 @@ AC_ARG_WITH(ridir,
  AC_SUBST(ridir)
  AC_SUBST(RI_BASE_NAME)
  
@@ -120,7 +120,7 @@ index 8ea969412f..a00f2b6776 100644
  
  AS_IF([test "${LOAD_RELATIVE+set}"], [
      AC_DEFINE_UNQUOTED(LOAD_RELATIVE, $LOAD_RELATIVE)
-@@ -3713,6 +3716,7 @@ AC_SUBST(sitearchincludedir)dnl
+@@ -3757,6 +3760,7 @@ AC_SUBST(sitearchincludedir)dnl
  AC_SUBST(arch)dnl
  AC_SUBST(sitearch)dnl
  AC_SUBST(ruby_version)dnl
@@ -171,14 +171,14 @@ diff --git a/tool/rbinstall.rb b/tool/rbinstall.rb
 index d4c110e..d39c9a6 100755
 --- a/tool/rbinstall.rb
 +++ b/tool/rbinstall.rb
-@@ -422,7 +422,7 @@ def CONFIG.[](name, mandatory = false)
+@@ -424,7 +424,7 @@ def CONFIG.[](name, mandatory = false)
  
  install?(:doc, :rdoc) do
    if $rdocdir
 -    ridatadir = File.join(CONFIG['ridir'], CONFIG['ruby_version'], "system")
 +    ridatadir = File.join(CONFIG['ridir'], CONFIG['ruby_version_dir_name'] || CONFIG['ruby_version'], "system")
      prepare "rdoc", ridatadir
-     install_recursive($rdocdir, ridatadir, :mode => $data_mode)
+     install_recursive($rdocdir, ridatadir, :no_install => rdoc_noinst, :mode => $data_mode)
    end
 -- 
 2.1.0
@@ -205,7 +205,7 @@ index 55ca080..75eea2b 100644
 -               RbConfig::CONFIG['ruby_version']
 +               RbConfig::CONFIG['ruby_version_dir_name'] || RbConfig::CONFIG['ruby_version']
               ]
-            elsif RbConfig::CONFIG['rubylibprefix'] then
+            elsif RbConfig::CONFIG['rubylibprefix']
               [
                 RbConfig::CONFIG['rubylibprefix'],
                 'gems',
@@ -245,7 +245,7 @@ diff --git a/test/rubygems/test_gem.rb b/test/rubygems/test_gem.rb
 index 0428bea..b6e090e 100644
 --- a/test/rubygems/test_gem.rb
 +++ b/test/rubygems/test_gem.rb
-@@ -1219,7 +1219,8 @@ def test_self_use_paths
+@@ -1278,7 +1278,8 @@ def test_self_use_paths
  
    def test_self_user_dir
      parts = [@userhome, '.gem', Gem.ruby_engine]
@@ -255,7 +255,7 @@ index 0428bea..b6e090e 100644
  
      assert_equal File.join(parts), Gem.user_dir
    end
-@@ -1296,7 +1297,7 @@ def test_self_gzip
+@@ -1355,7 +1356,7 @@ def test_self_gzip
    def test_self_vendor_dir
      expected =
        File.join RbConfig::CONFIG['vendordir'], 'gems',
diff --git a/ruby.spec b/ruby.spec
index 8f7d959..4859964 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -7,10 +7,10 @@
 %global ruby_release %{ruby_version}
 
 # Specify the named version. It has precedense to revision.
-%global milestone preview3
+#%%global milestone preview3
 
 # Keep the revision enabled for pre-releases from SVN.
-#%%global revision 61414
+%global revision 65928
 
 %global ruby_archive %{name}-%{ruby_version}
 
@@ -33,7 +33,7 @@
 %global molinillo_version 0.5.7
 
 %global bigdecimal_version 1.3.4
-%global bundler_version 1.17.1
+%global bundler_version 2.0.0.pre.1
 %global did_you_mean_version 1.2.1
 %global io_console_version 0.4.6
 # TODO: The IRB has strange versioning. Keep the Ruby's versioning ATM.
@@ -770,10 +770,6 @@ sed -i '/def test_mdns_each_address$/,/^  end$/ s/^/#/' test/resolv/test_mdns.rb
 # https://github.com/rubygems/rubygems/issues/2388
 DISABLE_TESTS="$DISABLE_TESTS -n !/test_do_not_allow_invalid_client_cert_auth_connection/"
 
-# Test failures due to `-fcf-protection' compiler option.
-# https://bugs.ruby-lang.org/issues/15307
-DISABLE_TESTS="$DISABLE_TESTS -n !/test_\(catching_deep_exception\|compile_insn_throw\|lambda_longjmp\)/"
-
 make check TESTS="-v $DISABLE_TESTS" MSPECOPT="-fs $MSPECOPTS"
 
 %files
@@ -1111,8 +1107,8 @@ make check TESTS="-v $DISABLE_TESTS" MSPECOPT="-fs $MSPECOPTS"
 %{gem_dir}/specifications/xmlrpc-%{xmlrpc_version}.gemspec
 
 %changelog
-* Thu Nov 15 2018 Vít Ondruch <vondruch@redhat.com> - 2.6.0-0.1.preview3
-- Update to Ruby 2.6.0.preview3.
+* Tue Nov 20 2018 Vít Ondruch <vondruch@redhat.com> - 2.6.0-0.1.65928
+- Upgrade to Ruby 2.6.0 (r65928).
 
 * Tue Nov 13 2018 Vít Ondruch <vondruch@redhat.com> - 2.5.3-102
 - Fix Tokyo TZ tests.