diff --git a/.github/renovate.json b/.github/renovate.json
index ae4f0aa..a780298 100644
--- a/.github/renovate.json
+++ b/.github/renovate.json
@@ -4,9 +4,9 @@
     ":preserveSemverRanges"
   ],
   "labels": ["auto-update"],
+  "dependencyDashboardAutoclose": true,
   "enabledManagers": ["terraform"],
   "terraform": {
     "ignorePaths": ["**/context.tf", "examples/**"]
   }
 }
-
diff --git a/iam-role.tf b/iam-role.tf
index 605336e..0aea659 100644
--- a/iam-role.tf
+++ b/iam-role.tf
@@ -13,7 +13,7 @@ data "aws_iam_policy_document" "assume_role_policy" {
 
     principals {
       type        = "Service"
-      identifiers = var.lambda_at_edge ? ["edgelambda.amazonaws.com"] : ["lambda.amazonaws.com"]
+      identifiers = concat(["lambda.amazonaws.com"], var.lambda_at_edge ? ["edgelambda.amazonaws.com"] : [])
     }
   }
 }