diff --git a/charts/k8s-aws-iam-controller/templates/deployment.yaml b/charts/k8s-aws-iam-controller/templates/deployment.yaml
index bb41cdb..1ee90e5 100644
--- a/charts/k8s-aws-iam-controller/templates/deployment.yaml
+++ b/charts/k8s-aws-iam-controller/templates/deployment.yaml
@@ -31,7 +31,7 @@ spec:
         - name: {{ .Chart.Name }}
           securityContext:
             {{- toYaml .Values.securityContext | nindent 12 }}
-          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default (lower .Chart.AppVersion) }}"
           env:
             - name: RUST_LOG
               value: "{{ .Values.logLevel | default "info" }}"