diff --git a/VERSION b/VERSION
index 9075be4951..eac1e0ada6 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.5.5
+1.5.6
diff --git a/params/version.go b/params/version.go
index 23704710bd..ba7a573810 100644
--- a/params/version.go
+++ b/params/version.go
@@ -19,10 +19,10 @@ package params
 import "fmt"
 
 const (
-	VersionMajor = 1        // Major version component of the current release
-	VersionMinor = 5        // Minor version component of the current release
-	VersionPatch = 5        // Patch version component of the current release
-	VersionMeta  = "stable" // Version metadata to append to the version string
+	VersionMajor = 1          // Major version component of the current release
+	VersionMinor = 5          // Minor version component of the current release
+	VersionPatch = 6          // Patch version component of the current release
+	VersionMeta  = "unstable" // Version metadata to append to the version string
 )
 
 // Version holds the textual version string.