diff --git a/CHANGELOG.md b/CHANGELOG.md
index ff1c3013f7..51b2b258a5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,12 @@
 
 ### Bug fixes
 
+# 1.12.3 (27 January 2021)
+
+### Bug fixes
+
+- Fix constant names for legacy scalar types
+
 # 1.12.2 (26 January 2021)
 
 ### New features
diff --git a/lib/graphql/version.rb b/lib/graphql/version.rb
index 82bbfb0f1a..d08dfeaca5 100644
--- a/lib/graphql/version.rb
+++ b/lib/graphql/version.rb
@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 module GraphQL
-  VERSION = "1.12.2"
+  VERSION = "1.12.3"
 end