diff --git a/k8s/charts/seaweedfs/Chart.yaml b/k8s/charts/seaweedfs/Chart.yaml
index 44e9ef26c..72bc13772 100644
--- a/k8s/charts/seaweedfs/Chart.yaml
+++ b/k8s/charts/seaweedfs/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v1
 description: SeaweedFS
 name: seaweedfs
-appVersion: "3.90"
+appVersion: "3.91"
 # Dev note: Trigger a helm chart release by `git tag -a helm-<version>`
-version: 4.0.390
+version: 4.0.391
diff --git a/weed/util/version/constants.go b/weed/util/version/constants.go
index 46dbb69b6..dec492509 100644
--- a/weed/util/version/constants.go
+++ b/weed/util/version/constants.go
@@ -10,7 +10,7 @@ const HttpStatusCancelled = 499
 
 var (
 	MAJOR_VERSION  = int32(3)
-	MINOR_VERSION  = int32(90)
+	MINOR_VERSION  = int32(91)
 	VERSION_NUMBER = fmt.Sprintf("%d.%02d", MAJOR_VERSION, MINOR_VERSION)
 	VERSION        = util.SizeLimit + " " + VERSION_NUMBER
 	COMMIT         = ""