diff --git a/charts/mok/Chart.yaml b/charts/mok/Chart.yaml
index 49c61b5877c0fb0abc6a012e33a9eebdf1edcd54..86ca35a5e3b15d70a6580d74c7b99b39a53e4a91 100644
--- a/charts/mok/Chart.yaml
+++ b/charts/mok/Chart.yaml
@@ -3,7 +3,7 @@ name: mok
 description: |
   Mail on Kubernetes (MoK) is a project to deploy a functional mailserver that runs without a database server on Kubernetes, taking advantage of configmaps and secret.
 type: application
-version: 0.9.0
+version: 0.9.1
 sources:
   - https://de.postfix.org/ftpmirror/index.html
   - https://github.com/dovecot/core
diff --git a/charts/mok/README.md b/charts/mok/README.md
index 60a3e6df9205820c300eb0b16f98269f7b27c775..adaa86274aa33d23fed7f760115aa5065895814f 100644
--- a/charts/mok/README.md
+++ b/charts/mok/README.md
@@ -1,6 +1,6 @@
 # mok
 
-![Version: 0.8.0](https://img.shields.io/badge/Version-0.8.0-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square)
+![Version: 0.9.1](https://img.shields.io/badge/Version-0.9.1-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square)
 
 Mail on Kubernetes (MoK) is a project to deploy a functional mailserver that runs without a database server on Kubernetes, taking advantage of configmaps and secret.
 
@@ -56,7 +56,7 @@ Mail on Kubernetes (MoK) is a project to deploy a functional mailserver that run
 | postfix.hostname | string | `nil` | explicitly set postfix hostname |
 | postfix.image.pullPolicy | string | `"IfNotPresent"` |  |
 | postfix.image.repository | string | `"quay.io/shivering-isles/postfix"` | postfix container image |
-| postfix.image.tag | string | `"0.4.2"` | Overrides the image tag whose default is "latest" |
+| postfix.image.tag | string | `"0.4.3"` | Overrides the image tag whose default is "latest" |
 | postfix.imagePullSecrets | list | `[]` |  |
 | postfix.nodeSelector | object | `{}` |  |
 | postfix.podAnnotations | object | `{}` |  |
diff --git a/charts/mok/values.yaml b/charts/mok/values.yaml
index 47eae5e3b2b0d7fc682c6d4e6e6e52e4100400d2..3d72f94d597824be2a7c75016ce1975188824480 100644
--- a/charts/mok/values.yaml
+++ b/charts/mok/values.yaml
@@ -46,7 +46,7 @@ postfix:
     repository: quay.io/shivering-isles/postfix
     pullPolicy: IfNotPresent
     # -- Overrides the image tag whose default is "latest"
-    tag: "0.4.2"
+    tag: "0.4.3"
 
   imagePullSecrets: []
 
diff --git a/images/postfix/.release b/images/postfix/.release
index 332fb5fb60a512cd6c359134e8d9076e9c4b30ce..1262b0cb12066f0dadf212d312152d04c0c41344 100644
--- a/images/postfix/.release
+++ b/images/postfix/.release
@@ -1 +1 @@
-release=0.4.2
+release=0.4.3