diff --git a/charts/stable/nextcloud/Chart.yaml b/charts/stable/nextcloud/Chart.yaml
index 3ea04f6718c..c1d3a8c6bbd 100644
--- a/charts/stable/nextcloud/Chart.yaml
+++ b/charts/stable/nextcloud/Chart.yaml
@@ -29,7 +29,7 @@ sources:
   - https://github.com/nextcloud/docker
   - https://github.com/nextcloud/helm
 type: application
-version: 21.0.17
+version: 21.0.18
 annotations:
   truecharts.org/catagories: |
     - cloud
diff --git a/charts/stable/nextcloud/questions.yaml b/charts/stable/nextcloud/questions.yaml
index f4e81c94ef0..6dd9695e5ef 100644
--- a/charts/stable/nextcloud/questions.yaml
+++ b/charts/stable/nextcloud/questions.yaml
@@ -179,10 +179,11 @@ questions:
                     - variable: max_allowed_resolution
                       label: Max Allowed Resolution
                       schema:
-                        type: int
+                        type: string
+                        valid_chars: '^[0-9]{3}(\.[0-9]{2})?$'
                         show_if: [["imaginary", "=", true]]
                         required: true
-                        default: 18.0
+                        default: "18.0"
                     - variable: max_file_size_image
                       label: Max File Size Image
                       schema: