diff --git a/services/prometheus.nix b/services/prometheus.nix
index dc87004..d7598d5 100644
--- a/services/prometheus.nix
+++ b/services/prometheus.nix
@@ -19,7 +19,7 @@
         scrape_interval = "15s";
         static_configs = [
           {
-            target = lib.pipe config.services.matrix-synapse.settings.listeners [
+            targets = lib.pipe config.services.matrix-synapse.settings.listeners [
               (lib.filter (l: l.type == "metrics"))
               builtins.head
               (l: "[${l.bind_addresses}]:${l.port}")