diff --git a/activesupport/lib/active_support/json/backends/yaml.rb b/activesupport/lib/active_support/json/backends/yaml.rb
index f9d8fd8e83..e25e29d36b 100644
--- a/activesupport/lib/active_support/json/backends/yaml.rb
+++ b/activesupport/lib/active_support/json/backends/yaml.rb
@@ -29,7 +29,7 @@ module ActiveSupport
           def convert_json_to_yaml(json) #:nodoc:
             require 'strscan' unless defined? ::StringScanner
             scanner, quoting, marks, pos, times = ::StringScanner.new(json), false, [], nil, []
-            while scanner.scan_until(/(\\['"]|['":,\\]|\\.)/)
+            while scanner.scan_until(/(\\['"]|['":,\\]|\\.|[\]])/)
               case char = scanner[1]
               when '"', "'"
                 if !quoting
@@ -43,7 +43,7 @@ module ActiveSupport
                   end
                   quoting = false
                 end
-              when ":",","
+              when ":",",", "]"
                 marks << scanner.pos - 1 unless quoting
               when "\\"
                 scanner.skip(/\\/)
diff --git a/activesupport/test/json/decoding_test.rb b/activesupport/test/json/decoding_test.rb
index 6b890c7d46..88cf97de7e 100644
--- a/activesupport/test/json/decoding_test.rb
+++ b/activesupport/test/json/decoding_test.rb
@@ -17,6 +17,8 @@ class TestJSONDecoding < ActiveSupport::TestCase
     %({"matzue": "松江", "asakusa": "浅草"}) => {"matzue" => "松江", "asakusa" => "浅草"},
     %({"a": "2007-01-01"})                       => {'a' => Date.new(2007, 1, 1)},
     %({"a": "2007-01-01 01:12:34 Z"})            => {'a' => Time.utc(2007, 1, 1, 1, 12, 34)},
+    %(["2007-01-01 01:12:34 Z"])                 => [Time.utc(2007, 1, 1, 1, 12, 34)],
+    %(["2007-01-01 01:12:34 Z", "2007-01-01 01:12:35 Z"]) => [Time.utc(2007, 1, 1, 1, 12, 34), Time.utc(2007, 1, 1, 1, 12, 35)],
     # no time zone
     %({"a": "2007-01-01 01:12:34"})              => {'a' => "2007-01-01 01:12:34"},
     # invalid date