diff --git a/rubygem-bundler.spec b/rubygem-bundler.spec
index 9ae4904..b8a8d97 100644
--- a/rubygem-bundler.spec
+++ b/rubygem-bundler.spec
@@ -12,8 +12,6 @@ URL: http://gembundler.com
 Source0: http://rubygems.org/gems/%{gem_name}-%{version}.gem
 Requires: ruby(release)
 Requires: ruby(rubygems)
-Requires: rubygem(thor)
-Requires: rubygem(net-http-persistent)
 BuildRequires: ruby(release)
 BuildRequires: rubygems-devel
 BuildRequires: ruby
@@ -62,6 +60,11 @@ chmod 755 %{buildroot}%{gem_instdir}/lib/bundler/templates/Executable*
 # Remove bundled libraries
 rm -rf %{buildroot}/%{gem_libdir}/bundler/vendor
 
+# Let the RubyGems load the Bundler dependencies. This comes handy when Bundler
+# is executed from Bundlerized environment.
+sed -i "/if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then/ a\      s.add_runtime_dependency(%q<thor>)" %{buildroot}%{gem_spec}
+sed -i "/if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then/ a\      s.add_runtime_dependency(%q<net-http-persistent>)" %{buildroot}%{gem_spec}
+
 # Man pages are used by Bundler internally, do not remove them!
 mkdir -p %{buildroot}%{_mandir}/man5
 cp -a %{buildroot}%{gem_libdir}/bundler/man/gemfile.5 %{buildroot}%{_mandir}/man5
@@ -133,6 +136,7 @@ EOF` rspec spec/
 %changelog
 * Mon Oct 27 2014 Vít Ondruch <vondruch@redhat.com> - 1.7.4-1
 - Update to Bundler 1.7.4.
+- Add thor and net-http-persistent dependencies into .gemspec.
 
 * Mon Sep 22 2014 Josef Stribny <jstribny@redhat.com> - 1.7.3-1
 - Update to 1.7.3