1 files changed, 2 insertions, 4 deletions
diff --git a/Gemfile b/Gemfile
index e82b4c2b27..1422da2723 100644
--- a/Gemfile
+++ b/Gemfile
@@ -79,10 +79,8 @@ platforms :jruby do
 end
 
 platforms :rbx do
-  gem 'psych'
-  gem 'rubysl-mathn'
-  gem 'rubysl-matrix'
-  gem 'rubysl-rexml'
+  gem 'psych', '~> 2.0'
+  gem 'rubysl', '~> 2.0'
 end
 
 # gems that are necessary for ActiveRecord tests with Oracle database