3 files changed, 6 insertions, 2 deletions

diff --git a/CHANGES.md b/CHANGES.md
index 4f536da..04159a0 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,9 @@
 # Changes
 
+## 2020-12-22 (2.5.1)
+
+* Restore the compatibility for constants of JSON class.
+
 ## 2020-12-22 (2.5.0)
 
 * Ready to Ractor-safe at Ruby 3.0.
diff --git a/VERSION b/VERSION
index 437459c..73462a5 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.5.0
+2.5.1
diff --git a/lib/json/version.rb b/lib/json/version.rb
index 2a0a6e8..7a72272 100644
--- a/lib/json/version.rb
+++ b/lib/json/version.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: false
 module JSON
   # JSON version
-  VERSION         = '2.5.0'
+  VERSION         = '2.5.1'
   VERSION_ARRAY   = VERSION.split(/\./).map { |x| x.to_i } # :nodoc:
   VERSION_MAJOR   = VERSION_ARRAY[0] # :nodoc:
   VERSION_MINOR   = VERSION_ARRAY[1] # :nodoc: