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-rw-r--r--lib/psych.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/psych.rb b/lib/psych.rb
index 9c6397d..aaec4a7 100644
--- a/lib/psych.rb
+++ b/lib/psych.rb
@@ -2,6 +2,8 @@ require 'psych/nodes/node'
require 'psych/nodes/stream'
require 'psych/nodes/document'
require 'psych/nodes/sequence'
+require 'psych/nodes/scalar'
+require 'psych/nodes/mapping'
require 'psych/handler'
require 'psych/tree_builder'