diff --git a/integrations/github/blueprints.json b/integrations/github/blueprints.json
index aa7508e..a5e1e49 100644
--- a/integrations/github/blueprints.json
+++ b/integrations/github/blueprints.json
@@ -66,10 +66,16 @@
         },
         "assignees": {
           "title": "Assignees",
+          "items": {
+            "type": "string"
+          },
           "type": "array"
         },
         "reviewers": {
           "title": "Reviewers",
+          "items": {
+            "type": "string"
+          },
           "type": "array"
         },
         "status": {