diff --git a/charts/matrix-synapse/values.yaml b/charts/matrix-synapse/values.yaml
index 4d2162d..2e9acf0 100644
--- a/charts/matrix-synapse/values.yaml
+++ b/charts/matrix-synapse/values.yaml
@@ -742,6 +742,8 @@ ingress:
   ##
   annotations: {}
   #  nginx.ingress.kubernetes.io/use-regex: "true"
+  #  # Sync proxy-body-size with Synapse's max_upload_size which is 10M by default
+  #  nginx.ingress.kubernetes.io/proxy-body-size: 10m
   #  kubernetes.io/ingress.class: nginx
   #  kubernetes.io/tls-acme: "true"