diff --git a/charts/photoprism/Chart.yaml b/charts/photoprism/Chart.yaml
index 9c190cd4..8bde5b05 100644
--- a/charts/photoprism/Chart.yaml
+++ b/charts/photoprism/Chart.yaml
@@ -1,5 +1,5 @@
 apiVersion: v2
-appVersion: 20201122
+appVersion: "20201122"
 description: PhotoPrism® is a server-based application for browsing, organizing and sharing your personal photo collection
 name: photoprism
 version: 1.0.0