diff --git a/stable/mariadb/Chart.yaml b/stable/mariadb/Chart.yaml
index 0c7d6603ea..a1c484c248 100644
--- a/stable/mariadb/Chart.yaml
+++ b/stable/mariadb/Chart.yaml
@@ -1,5 +1,5 @@
 name: mariadb
-version: 4.2.0
+version: 4.2.1
 appVersion: 10.1.33
 description: Fast, reliable, scalable, and easy to use open-source relational database system. MariaDB Server is intended for mission-critical, heavy-load production systems as well as for embedding into mass-deployed software. Highly available MariaDB cluster.
 keywords:
diff --git a/stable/mariadb/templates/_helpers.tpl b/stable/mariadb/templates/_helpers.tpl
index ad5e2a33d1..73b82c2b10 100644
--- a/stable/mariadb/templates/_helpers.tpl
+++ b/stable/mariadb/templates/_helpers.tpl
@@ -38,7 +38,7 @@ Return the proper image name
 {{- define "mariadb.image" -}}
 {{- $registryName :=  .Values.image.registry -}}
 {{- $repositoryName := .Values.image.repository -}}
-{{- $tag := .Values.image.tag -}}
+{{- $tag := .Values.image.tag | toString -}}
 {{- printf "%s/%s:%s" $registryName $repositoryName $tag -}}
 {{- end -}}
 
@@ -48,6 +48,6 @@ Return the proper image name
 {{- define "metrics.image" -}}
 {{- $registryName :=  .Values.metrics.mage.registry -}}
 {{- $repositoryName := .Values.metrics.image.repository -}}
-{{- $tag := .Values.metrics.image.tag -}}
+{{- $tag := .Values.metrics.image.tag | toString -}}
 {{- printf "%s/%s:%s" $registryName $repositoryName $tag -}}
 {{- end -}}