diff --git a/src/grafana.js b/src/grafana.js
index 37b27e3..2028a47 100644
--- a/src/grafana.js
+++ b/src/grafana.js
@@ -35,10 +35,12 @@ function transpose(input) {
     ...Object.fromEntries(Object.entries(payload.commonLabels).map(([k, v]) => [`grafana/labels-${k}`, v])),
     ...Object.fromEntries(Object.entries(payload.groupLabels).map(([k, v]) => [`grafana/grouped-by-${k}`, v]))
   };
+
+  const fingerprints = payload.alerts.map((alert) => alert.fingerprint);
  
   // Construct Signal
   let signal = {
-    idempotency_key: md5(payload.groupKey),
+    idempotency_key: md5(fingerprints.sort().join(' ')),
     summary: payload.title,
     body: payload.message,
     links: links,