diff --git a/common/headers/versionChecker.go b/common/headers/versionChecker.go
index 4e6bc170c64..2f62e0340f7 100644
--- a/common/headers/versionChecker.go
+++ b/common/headers/versionChecker.go
@@ -46,7 +46,7 @@ const (
 	ClientNameCLI           = "temporal-cli"
 	ClientNameUI            = "temporal-ui"
 
-	ServerVersion = "1.21.5"
+	ServerVersion = "1.21.6"
 
 	// SupportedServerVersions is used by CLI and inter role communication.
 	SupportedServerVersions = ">=1.0.0 <2.0.0"