diff --git a/example/collection.json b/example/collection.json
index 5f178d5..176e0a0 100644
--- a/example/collection.json
+++ b/example/collection.json
@@ -4,10 +4,22 @@
   "description": "An example STAC collection",
   "extent": {
     "spatial": {
-      "bbox": [[-180, -90, 180, 90]]
+      "bbox": [
+        [
+          -180,
+          -90,
+          180,
+          90
+        ]
+      ]
     },
     "temporal": {
-      "interval": [["2020-01-01T00:00:00Z", "2020-12-31T23:59:59Z"]]
+      "interval": [
+        [
+          "2020-01-01T00:00:00Z",
+          "2020-12-31T23:59:59Z"
+        ]
+      ]
     }
   },
   "links": [
@@ -27,5 +39,11 @@
       "type": "application/json",
       "title": "Example Item"
     }
-  ]
+  ],
+  "summaries": {
+    "day_of_year": {
+      "minimum": 1,
+      "maximum": 366
+    }
+  }
 }