diff --git a/roles/robosignatory/files/robosignatory.production.py b/roles/robosignatory/files/robosignatory.production.py
index 668d176aec..2e837444d1 100644
--- a/roles/robosignatory/files/robosignatory.production.py
+++ b/roles/robosignatory/files/robosignatory.production.py
@@ -153,6 +153,18 @@ config = {
     },
 
     'robosignatory.ostree_refs': {
+        'fedora/28/x8_64/iot': {
+            'directory': '/mnt/fedora_koji/koji/compose/iot/',
+            'key': 'fedora-28'
+        },
+        'fedora/28/aarch64/iot': {
+            'directory': '/mnt/fedora_koji/koji/compose/iot/',
+            'key': 'fedora-28'
+        },
+        'fedora/28/armhfp/iot': {
+            'directory': '/mnt/fedora_koji/koji/compose/iot/',
+            'key': 'fedora-28'
+        },
         'fedora/26/x86_64/testing/atomic-host': {
             'directory': '/mnt/fedora_koji/koji/compose/atomic/repo/',
             'key': 'fedora-26'