diff --git a/lib/psych/versions.rb b/lib/psych/versions.rb
index 5e506a0c..daf5a199 100644
--- a/lib/psych/versions.rb
+++ b/lib/psych/versions.rb
@@ -5,6 +5,6 @@ module Psych
   VERSION = '3.3.2'
 
   if RUBY_ENGINE == 'jruby'
-    DEFAULT_SNAKEYAML_VERSION = '1.29'.freeze
+    DEFAULT_SNAKEYAML_VERSION = '1.31'.freeze
   end
 end