diff --git a/HISTORY.md b/HISTORY.md
index 2497533..67a687c 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,10 @@
 # History
 
+### v5.6.3 (August 29, 2025)
+
+The Datadog client should have faster performance, by copying less metric data
+before writing it to the socket.
+
 ### v5.6.2 (July 10, 2025)
 
 Remove outdated README content and add debugstats examples.
diff --git a/version/version.go b/version/version.go
index 19d57b5..93be9f9 100644
--- a/version/version.go
+++ b/version/version.go
@@ -6,7 +6,7 @@ import (
 	"sync"
 )
 
-const Version = "5.6.2"
+const Version = "5.6.3"
 
 var (
 	vsnOnce sync.Once