diff --git a/exercises/binary/canonical-data.json b/exercises/binary/canonical-data.json
index b0544c8a34..844421715f 100644
--- a/exercises/binary/canonical-data.json
+++ b/exercises/binary/canonical-data.json
@@ -1,79 +1,96 @@
 {
-   "decimal": [
-      {
-         "description": "binary 0 is decimal 0",
-         "binary": "0",
-         "expected": 0
-      },
-      {
-         "description": "binary 1 is decimal 1",
-         "binary": "1",
-         "expected": 1
-      },
-      {
-         "description": "binary 10 is decimal 2",
-         "binary": "10",
-         "expected": 2
-      },
-      {
-         "description": "binary 11 is decimal 3",
-         "binary": "11",
-         "expected": 3
-      },
-      {
-         "description": "binary 100 is decimal 4",
-         "binary": "100",
-         "expected": 4
-      },
-      {
-         "description": "binary 1001 is decimal 9",
-         "binary": "1001",
-         "expected": 9
-      },
-      {
-         "description": "binary 11010 is decimal 26",
-         "binary": "11010",
-         "expected": 26
-      },
-      {
-         "description": "binary 10001101000 is decimal 1128",
-         "binary": "10001101000",
-         "expected": 1128
-      },
-      {
-         "description": "binary ignores leading zeros",
-         "binary": "000011111",
-         "expected": 31
-      },
-      {
-        "description": "2 is not a valid binary digit",
-        "binary": "2",
-        "expected": null
-      },
-      {
-        "description": "a number containing a non-binary digit is invalid",
-        "binary": "01201",
-        "expected": null
-      },
-      {
-        "description": "a number with trailing non-binary characters is invalid",
-        "binary": "10nope",
-        "expected": null
-      },
-      {
-        "description": "a number with leading non-binary characters is invalid",
-        "binary": "nope10",
-        "expected": null
-      },
-      {
-        "description": "a number with internal non-binary characters is invalid",
-        "binary": "10nope10",
-        "expected": null
-      },
-      {
-        "description": "a number and a word whitespace spearated is invalid",
-        "binary": "001 nope",
-        "expected": null
-      }
-   ]
+  "exercise": "binary",
+  "version": "1.0.0",
+  "cases": [
+    {
+      "description": "binary 0 is decimal 0",
+      "property": "decimal",
+      "binary": "0",
+      "expected": 0
+    },
+    {
+      "description": "binary 1 is decimal 1",
+      "property": "decimal",
+      "binary": "1",
+      "expected": 1
+    },
+    {
+      "description": "binary 10 is decimal 2",
+      "property": "decimal",
+      "binary": "10",
+      "expected": 2
+    },
+    {
+      "description": "binary 11 is decimal 3",
+      "property": "decimal",
+      "binary": "11",
+      "expected": 3
+    },
+    {
+      "description": "binary 100 is decimal 4",
+      "property": "decimal",
+      "binary": "100",
+      "expected": 4
+    },
+    {
+      "description": "binary 1001 is decimal 9",
+      "property": "decimal",
+      "binary": "1001",
+      "expected": 9
+    },
+    {
+      "description": "binary 11010 is decimal 26",
+      "property": "decimal",
+      "binary": "11010",
+      "expected": 26
+    },
+    {
+      "description": "binary 10001101000 is decimal 1128",
+      "property": "decimal",
+      "binary": "10001101000",
+      "expected": 1128
+    },
+    {
+      "description": "binary ignores leading zeros",
+      "property": "decimal",
+      "binary": "000011111",
+      "expected": 31
+    },
+    {
+      "description": "2 is not a valid binary digit",
+      "property": "decimal",
+      "binary": "2",
+      "expected": null
+    },
+    {
+      "description": "a number containing a non-binary digit is invalid",
+      "property": "decimal",
+      "binary": "01201",
+      "expected": null
+    },
+    {
+      "description": "a number with trailing non-binary characters is invalid",
+      "property": "decimal",
+      "binary": "10nope",
+      "expected": null
+    },
+    {
+      "description": "a number with leading non-binary characters is invalid",
+      "property": "decimal",
+      "binary": "nope10",
+      "expected": null
+    },
+    {
+      "description": "a number with internal non-binary characters is invalid",
+      "property": "decimal",
+      "binary": "10nope10",
+      "expected": null
+    },
+    {
+      "description": "a number and a word whitespace spearated is invalid",
+      "property": "decimal",
+      "binary": "001 nope",
+      "expected": null
+    }
+  ]
 }