diff --git a/charts/cert-manager/templates/deployment.yaml b/charts/cert-manager/templates/deployment.yaml
index 8a4a973..b1af927 100644
--- a/charts/cert-manager/templates/deployment.yaml
+++ b/charts/cert-manager/templates/deployment.yaml
@@ -211,7 +211,9 @@
           {{- end }}
       {{- with .Values.nodeSelector }}
       nodeSelector:
-        {{- toYaml . | nindent 8 }}
+        {{- range $key, $value := . }}
+        {{ $key }}: {{ $value | quote }}
+        {{- end }}
       {{- end }}
       {{- with .Values.affinity }}
       affinity: