diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4d91389cd1..bea5d615d3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,12 @@
 
 ### Bug fixes
 
+# 2.3.9 (13 Jul 2024)
+
+### Bug fixes
+
+- Subscriptions: fix `subscriptionType` in introspection #5019
+
 # 2.3.8 (12 Jul 2024)
 
 ### New features
diff --git a/lib/graphql/version.rb b/lib/graphql/version.rb
index 6d608be969..42f1e7d12c 100644
--- a/lib/graphql/version.rb
+++ b/lib/graphql/version.rb
@@ -1,4 +1,4 @@
 # frozen_string_literal: true
 module GraphQL
-  VERSION = "2.3.8"
+  VERSION = "2.3.9"
 end