diff --git a/History.md b/History.md
index 2a8da268eb..0a92f3f817 100644
--- a/History.md
+++ b/History.md
@@ -1,4 +1,4 @@
-## 5.6.3 / 2022-03-30
+## 5.6.4 / 2022-03-30
 
 * Security
   * Close several HTTP Request Smuggling exploits (CVE-2022-24790)
diff --git a/lib/puma/const.rb b/lib/puma/const.rb
index 73a9e09509..a8eb1bedf0 100644
--- a/lib/puma/const.rb
+++ b/lib/puma/const.rb
@@ -100,7 +100,7 @@ class UnsupportedOption < RuntimeError
   # too taxing on performance.
   module Const
 
-    PUMA_VERSION = VERSION = "5.6.3".freeze
+    PUMA_VERSION = VERSION = "5.6.4".freeze
     CODE_NAME = "Birdie's Version".freeze
 
     PUMA_SERVER_STRING = ['puma', PUMA_VERSION, CODE_NAME].join(' ').freeze