diff --git a/exercises/leap/canonical-data.json b/exercises/leap/canonical-data.json
index 9a0750dd7b..799adaa163 100644
--- a/exercises/leap/canonical-data.json
+++ b/exercises/leap/canonical-data.json
@@ -1,24 +1,30 @@
 {
-   "cases": [
-      {
-         "description": "year not divisible by 4: common year",
-         "input": 2015,
-         "expected": false
-      },
-      {
-         "description": "year divisible by 4, not divisible by 100: leap year",
-         "input": 2016,
-         "expected": true
-      },
-      {
-         "description": "year divisible by 100, not divisible by 400: common year",
-         "input": 2100,
-         "expected": false
-      },
-      {
-         "description": "year divisible by 400: leap year",
-         "input": 2000,
-         "expected": true
-      }
-   ]
+  "exercise": "leap",
+  "version": "1.0.0",
+  "cases": [
+    {
+      "description": "year not divisible by 4: common year",
+      "property": "leapYear",
+      "input": 2015,
+      "expected": false
+    },
+    {
+      "description": "year divisible by 4, not divisible by 100: leap year",
+      "property": "leapYear",
+      "input": 2016,
+      "expected": true
+    },
+    {
+      "description": "year divisible by 100, not divisible by 400: common year",
+      "property": "leapYear",
+      "input": 2100,
+      "expected": false
+    },
+    {
+      "description": "year divisible by 400: leap year",
+      "property": "leapYear",
+      "input": 2000,
+      "expected": true
+    }
+  ]
 }