diff --git a/charts/nextcloud-mcp-server/README.md b/charts/nextcloud-mcp-server/README.md
index 7843d86..e6b120e 100644
--- a/charts/nextcloud-mcp-server/README.md
+++ b/charts/nextcloud-mcp-server/README.md
@@ -139,9 +139,10 @@ mcp:
 | Parameter | Description | Default |
 |-----------|-------------|---------|
 | `image.repository` | Container image repository | `ghcr.io/cbcoutinho/nextcloud-mcp-server` |
-| `image.tag` | Container image tag | `""` (uses chart appVersion) |
 | `image.pullPolicy` | Image pull policy | `IfNotPresent` |
 
+**Note:** Image tag is automatically set to the chart's `appVersion` and cannot be overridden.
+
 #### Resources
 
 | Parameter | Description | Default |
@@ -390,7 +391,6 @@ helm upgrade nextcloud-mcp ./helm/nextcloud-mcp-server -f custom-values.yaml
 
 ```bash
 helm upgrade nextcloud-mcp ./helm/nextcloud-mcp-server \
-  --set image.tag=0.21.0 \
   --set resources.limits.memory=1Gi
 ```
 
diff --git a/charts/nextcloud-mcp-server/templates/_helpers.tpl b/charts/nextcloud-mcp-server/templates/_helpers.tpl
index 5b2c5c2..b8616f1 100644
--- a/charts/nextcloud-mcp-server/templates/_helpers.tpl
+++ b/charts/nextcloud-mcp-server/templates/_helpers.tpl
@@ -102,10 +102,10 @@ Return the MCP server port
 {{- end }}
 
 {{/*
-Return the image tag
+Return the image tag (always uses chart appVersion)
 */}}
 {{- define "nextcloud-mcp-server.imageTag" -}}
-{{- .Values.image.tag | default .Chart.AppVersion }}
+{{- .Chart.AppVersion }}
 {{- end }}
 
 {{/*
diff --git a/charts/nextcloud-mcp-server/values.yaml b/charts/nextcloud-mcp-server/values.yaml
index a74d934..ab4361a 100644
--- a/charts/nextcloud-mcp-server/values.yaml
+++ b/charts/nextcloud-mcp-server/values.yaml
@@ -8,8 +8,7 @@ replicaCount: 1
 image:
   repository: ghcr.io/cbcoutinho/nextcloud-mcp-server
   pullPolicy: IfNotPresent
-  # Overrides the image tag whose default is the chart appVersion.
-  tag: "@sha256:59f8a9e12e879094936362417b95a74377029f49f8fe3985606a7f45fe7c31f9"
+  # Image tag is automatically set to chart appVersion
 
 imagePullSecrets: []
 nameOverride: ""