diff --git a/chart/values.yaml b/chart/values.yaml
index a638f4a7d66..ff45a7b6179 100644
--- a/chart/values.yaml
+++ b/chart/values.yaml
@@ -60,7 +60,7 @@ mastodon:
     concurrency: 25
   smtp:
     auth_method: plain
-    ca_file:
+    ca_file: /etc/ssl/certs/ca-certificates.crt
     delivery_method: smtp
     domain:
     enable_starttls_auto: true