diff --git a/.drone.yml b/.drone.yml
index 998ba5d..679fa0e 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -17,7 +17,7 @@ steps:
 - name: helm lint
   commands:
   - helm lint
-  image: git.cryptic.systems/volker.raschek/helm:3.17.1
+  image: git.cryptic.systems/volker.raschek/helm:3.18.5
   resources:
     limits:
       cpu: 150
@@ -26,7 +26,7 @@ steps:
 - name: markdown lint
   commands:
   - markdownlint *.md
-  image: git.cryptic.systems/volker.raschek/markdownlint:0.44.0
+  image: git.cryptic.systems/volker.raschek/markdownlint:0.45.0
   resources:
     limits:
       cpu: 150
@@ -35,7 +35,7 @@ steps:
 - name: helm template
   commands:
   - helm template .
-  image: git.cryptic.systems/volker.raschek/helm:3.17.1
+  image: git.cryptic.systems/volker.raschek/helm:3.18.5
   resources:
     limits:
       cpu: 150
@@ -53,7 +53,7 @@ steps:
       from_secret: smtp_username
     SMTP_PASSWORD:
       from_secret: smtp_password
-  image: git.cryptic.systems/volker.raschek/drone-email:0.1.5
+  image: git.cryptic.systems/volker.raschek/drone-email:0.2.0
   resources:
     limits:
       cpu: 150
@@ -93,7 +93,7 @@ steps:
       from_secret: helm_repo_password
     HELM_REPO_USERNAME:
       from_secret: helm_repo_username
-  image: git.cryptic.systems/volker.raschek/helm:3.17.1
+  image: git.cryptic.systems/volker.raschek/helm:3.18.5
   resources:
     limits:
       cpu: 150
diff --git a/Chart.yaml b/Chart.yaml
index 460f829..349b4e6 100644
--- a/Chart.yaml
+++ b/Chart.yaml
@@ -3,7 +3,7 @@ name: roundcube
 description: Helm chart for roundcube
 type: application
 version: "0.2.1"
-appVersion: "1.5.3-apache"
+appVersion: "1.5.3-fpm-alpine"
 icon: https://upload.wikimedia.org/wikipedia/commons/e/e3/Roundcube_logo_icon.svg
 
 keywords: