diff --git a/.github/workflows/notify-on-release.yaml b/.github/workflows/notify-on-release.yaml
new file mode 100644
index 00000000..1dd9d4ed
--- /dev/null
+++ b/.github/workflows/notify-on-release.yaml
@@ -0,0 +1,24 @@
+on:
+  release:
+    types: [published]
+
+jobs:
+  send-message:
+    runs-on: ubuntu-latest
+    name: Send message via Matrix
+    steps:
+    - name: Send message to mailu-helm-chart channel
+      id: matrix-chat-message
+      uses: fadenb/matrix-chat-message@v0.0.6
+      with:
+        homeserver: 'matrix.org'
+        token: ${{ secrets.MATRIX_TOKEN }}
+        channel: '!KluZWhQwHDYrOfqJdD:make-it.fr'
+        message: |
+          # New release of mailu-helm-chart
+          \
+          Version: **${{ github.event.release.tag_name }}**\
+          URL: **${{ github.event.release.html_url }}**\
+          \
+          Description:\
+          ```${{ github.event.release.body }}```
diff --git a/mailu/Chart.yaml b/mailu/Chart.yaml
index 69f1cb39..f7ab28ea 100644
--- a/mailu/Chart.yaml
+++ b/mailu/Chart.yaml
@@ -1,6 +1,6 @@
 apiVersion: v2
 appVersion: "1.9"
-version: 1.0.0-beta.9
+version: 1.0.0-beta.10
 name: mailu
 description: This chart installs the Mailu mail system on kubernetes
 home: https://mailu.io
diff --git a/mailu/templates/_database.tpl b/mailu/templates/_database.tpl
index 969ad263..d029779b 100644
--- a/mailu/templates/_database.tpl
+++ b/mailu/templates/_database.tpl
@@ -78,17 +78,17 @@
 
 {{/* Return the name of the external database */}}
 {{- define "mailu.database.external.database" -}}
-{{ include "common.secrets.lookup" (dict "secret" (include "mailu.database.external.secretName" .) "key" .Values.externalDatabase.existingSecretDatabaseKey "defaultValue" .Values.externalDatabase.database "context" .) }}
+{{ (include "common.secrets.lookup" (dict "secret" (include "mailu.database.external.secretName" .) "key" .Values.externalDatabase.existingSecretDatabaseKey "defaultValue" .Values.externalDatabase.database "context" .))  | toString | b64dec }}
 {{- end -}}
 
 {{/* Return the username of the external database */}}
 {{- define "mailu.database.external.username" -}}
-{{ include "common.secrets.lookup" (dict "secret" (include "mailu.database.external.secretName" .) "key" .Values.externalDatabase.existingSecretUsernameKey "defaultValue" .Values.externalDatabase.username "context" .) }}
+{{ (include "common.secrets.lookup" (dict "secret" (include "mailu.database.external.secretName" .) "key" .Values.externalDatabase.existingSecretUsernameKey "defaultValue" .Values.externalDatabase.username "context" .))  | toString | b64dec }}
 {{- end -}}
 
 {{/* Return the password of the external database */}}
 {{- define "mailu.database.external.password" -}}
-{{ include "common.secrets.lookup" (dict "secret" (include "mailu.database.external.secretName" .) "key" .Values.externalDatabase.existingSecretPasswordKey "defaultValue" .Values.externalDatabase.password "context" .) }}
+{{ (include "common.secrets.lookup" (dict "secret" (include "mailu.database.external.secretName" .) "key" .Values.externalDatabase.existingSecretPasswordKey "defaultValue" .Values.externalDatabase.password "context" .))  | toString | b64dec }}
 {{- end -}}
 
 {{/* Return the name of the mailu database secret with its credentials */}}
diff --git a/mailu/templates/secret-external-db.yaml b/mailu/templates/secret-external-db.yaml
index d6a882c8..32b72a9c 100644
--- a/mailu/templates/secret-external-db.yaml
+++ b/mailu/templates/secret-external-db.yaml
@@ -13,8 +13,8 @@ metadata:
   annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" . ) | nindent 4 }}
   {{- end }}
 type: Opaque
-stringData:
-  {{ .Values.externalDatabase.existingSecretDatabaseKey -}}: {{ (include "mailu.database.external.database" . ) | quote }}
-  {{ .Values.externalDatabase.existingSecretUsernameKey -}}: {{ (include "mailu.database.external.username" . ) | quote }}
-  {{ .Values.externalDatabase.existingSecretPasswordKey -}}: {{ (include "mailu.database.external.password" . ) | quote }}
+data:
+  {{ .Values.externalDatabase.existingSecretDatabaseKey -}}: {{ (include "mailu.database.external.database" . ) | toString | b64enc | quote }}
+  {{ .Values.externalDatabase.existingSecretUsernameKey -}}: {{ (include "mailu.database.external.username" . ) | toString | b64enc | quote }}
+  {{ .Values.externalDatabase.existingSecretPasswordKey -}}: {{ (include "mailu.database.external.password" . ) | toString | b64enc | quote }}
 {{- end }}