diff --git a/lib/psych/versions.rb b/lib/psych/versions.rb
index 63c0ed6d..d4294e46 100644
--- a/lib/psych/versions.rb
+++ b/lib/psych/versions.rb
@@ -2,9 +2,9 @@
 
 module Psych
   # The version of Psych you are using
-  VERSION = '3.3.3'
+  VERSION = '3.3.4'
 
   if RUBY_ENGINE == 'jruby'
-    DEFAULT_SNAKEYAML_VERSION = '1.31'.freeze
+    DEFAULT_SNAKEYAML_VERSION = '1.33'.freeze
   end
 end