diff --git a/configuration.nix b/configuration.nix
index dfa10d3..fdf21a3 100644
--- a/configuration.nix
+++ b/configuration.nix
@@ -176,7 +176,7 @@
 
   # Allow read access to ACME certificate
   # to specific (service) users.
-  users.groups."maxwell-ydns-eu".members = [ "murmur" "turnserver" ];
+  users.groups."maxwell-ydns-eu".members = [ "murmur" "turnserver" "nginx" ];
   users.groups."riot-maxwell-ydns-eu".members = [ "nginx" ];