diff --git a/ruby.spec b/ruby.spec
index f037e00..94381c9 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 preview2
+%global milestone rc1
 
 # Keep the revision enabled for pre-releases from GIT.
-%global revision 071df40495
+%global revision 1ab91b12fa
 
 %global ruby_archive %{name}-%{ruby_version}
 
@@ -54,7 +54,7 @@
 %global drb_version 2.2.0
 %global english_version 0.8.0
 %global erb_version 4.0.3
-%global error_highlight_version 0.5.1
+%global error_highlight_version 0.6.0
 %global etc_version 1.4.3.dev.1
 %global fcntl_version 1.1.0
 %global fiddle_version 1.1.2
@@ -87,12 +87,12 @@
 %global rinda_version 0.2.0
 %global ruby2_keywords_version 0.0.5
 %global securerandom_version 0.3.0
-%global set_version 1.0.3
+%global set_version 1.0.4
 %global shellwords_version 0.2.0
 %global singleton_version 0.2.0
 %global stringio_version 3.1.1
 %global strscan_version 3.0.8
-%global syntax_suggest_version 1.1.0
+%global syntax_suggest_version 2.0.0
 %global syslog_version 0.1.1
 %global tempfile_version 0.2.1
 %global time_version 0.3.0
@@ -130,7 +130,7 @@
 %global prime_version 0.1.2
 %global rbs_version 3.3.2
 %global typeprof_version 0.21.8
-%global debug_version 1.8.0
+%global debug_version 1.9.0
 %global racc_version 1.7.3
 
 %global tapset_libdir %(echo %{_libdir} | sed 's/64//')*
@@ -1553,8 +1553,8 @@ make -C %{_vpath_builddir} runruby TESTRUN_SCRIPT=" \
 
 
 %changelog
-* Thu Dec 07 2023 Vít Ondruch <vondruch@redhat.com> - 3.3.0-184
-- Upgrade to Ruby 3.3.0 (071df40495).
+* Mon Dec 11 2023 Vít Ondruch <vondruch@redhat.com> - 3.3.0-184
+- Upgrade to Ruby 3.3.0-rc1.
 
 * Thu Nov 09 2023 Jun Aruga <jaruga@redhat.com> - 3.2.2-183
 - ssl: use ffdhe2048 from RFC 7919 as the default DH group parameters