diff --git a/params/config.go b/params/config.go
index 9b3d32c2fd06..121b30904770 100644
--- a/params/config.go
+++ b/params/config.go
@@ -64,6 +64,7 @@ var (
 		IshikariBlock:         big.NewInt(11171299),
 		IshikariPatch001Block: big.NewInt(11171299),
 		IshikariPatch002Block: big.NewInt(11171299),
+		AmazonBlock:           big.NewInt(24766075),
 		POSA: &POSAConfig{
 			Period: 3,
 			Epoch:  100,
diff --git a/params/version.go b/params/version.go
index eb06dc95cf18..d7b624336422 100644
--- a/params/version.go
+++ b/params/version.go
@@ -21,10 +21,10 @@ import (
 )
 
 const (
-	VersionMajor = 1          // Major version component of the current release
-	VersionMinor = 4          // Minor version component of the current release
-	VersionPatch = 0          // Patch version component of the current release
-	VersionMeta  = "unstable" // Version metadata to append to the version string
+	VersionMajor = 1        // Major version component of the current release
+	VersionMinor = 4        // Minor version component of the current release
+	VersionPatch = 1        // Patch version component of the current release
+	VersionMeta  = "stable" // Version metadata to append to the version string
 )
 
 // Version holds the textual version string.