Rakefile in rbs-0.17.0 vs Rakefile in rbs-0.18.0

@@ -34,9 +34,14 @@
 
     if lib == ["bigdecimal-math"]
       lib << "bigdecimal"
     end
 
+    if lib == ["yaml"]
+      lib << "dbm"
+      lib << "pstore"
+    end
+
     sh "#{ruby} #{rbs} #{lib.map {|l| "-r #{l}"}.join(" ")} validate --silent"
   end
 end
 
 FileList["test/stdlib/**/*_test.rb"].each do |test|