diff --git a/main.star b/main.star
index 86885b04c..d1daea8dc 100644
--- a/main.star
+++ b/main.star
@@ -159,11 +159,13 @@ def run(plan, args={}):
         builder_uri = "http://{0}:{1}".format(
             all_el_client_contexts[-1].ip_addr, all_el_client_contexts[-1].rpc_port_num
         )
-        beacon_uri = [
-            "http://{0}:{1}".format(context.ip_addr, context.http_port_num)
-            for context in all_cl_client_contexts
-        ][-1]
-        beacon_uris = beacon_uri
+        beacon_uris = ",".join(
+            [
+                "http://{0}:{1}".format(context.ip_addr, context.http_port_num)
+                for context in all_cl_client_contexts
+            ]
+        )
+
         first_cl_client = all_cl_client_contexts[0]
         first_client_beacon_name = first_cl_client.beacon_service_name
         mev_flood_module.launch_mev_flood(