diff --git a/ruby.spec b/ruby.spec
index b050ad2..d87724c 100644
--- a/ruby.spec
+++ b/ruby.spec
@@ -87,8 +87,10 @@
 %global set_version 1.1.0
 %global shellwords_version 0.2.0
 %global singleton_version 0.2.0
-%global stringio_version 3.1.2.dev
-%global strscan_version 3.1.1.dev
+%global stringio_version 3.1.2
+%global stringio_prerelease .dev
+%global strscan_version 3.1.1
+%global strscan_prerelease .dev
 %global syntax_suggest_version 2.0.0
 %global syslog_version 0.1.2
 %global tempfile_version 0.2.1
@@ -108,7 +110,8 @@
 %global io_console_version 0.7.2
 %global irb_version 1.14.1
 %global json_version 2.7.2
-%global psych_version 5.2.0.beta1
+%global psych_version 5.2.0
+%global psych_prerelease .beta1
 %global rdoc_version 6.7.0
 
 # Bundled gems.
@@ -393,7 +396,7 @@ Requires:   ruby(release)
 Recommends: rubygem(bundler) >= %{bundler_version}
 Recommends: rubygem(rdoc) >= %{rdoc_version}
 Recommends: rubygem(io-console)
-Requires:   rubygem(psych) >= %{psych_version}
+Requires:   rubygem(psych) >= %{psych_version}%{?psych_prerelease:~%{sub %{psych_prerelease} 2 -1}}
 Provides:   gem = %{version}-%{release}
 Provides:   ruby(rubygems) = %{version}-%{release}
 Provides:   bundled(rubygems) = %{rubygems_version}
@@ -544,9 +547,9 @@ markup language.
 
 %package -n rubygem-psych
 Summary:    A libyaml wrapper for Ruby
-Version:    %{psych_version}
+Version:    %{psych_version}%{?psych_prerelease:~%{sub %{psych_prerelease} 2 -1}}
 License:    MIT
-Provides:   bundled(rubygem-psych) = %{psych_version}
+Provides:   bundled(rubygem-psych) = %{psych_version}%{?psych_prerelease:~%{sub %{psych_prerelease} 2 -1}}
 
 %description -n rubygem-psych
 Psych is a YAML parser and emitter. Psych leverages