diff --git a/docs/specs/0106-research-artifact-vocabularies.md b/docs/specs/0106-research-artifact-vocabularies.md
index e5163a7..fc107bd 100644
--- a/docs/specs/0106-research-artifact-vocabularies.md
+++ b/docs/specs/0106-research-artifact-vocabularies.md
@@ -126,7 +126,8 @@ resolution comment):
   },
   "strategies": [
     { "ref": { "content_id": "9f3a…" },
-      "axes": { "fast": [8, 12, 16], "slow": [21, 34] } }
+      "axes": { "fast": [{"I64": 8}, {"I64": 12}, {"I64": 16}],
+                "slow": [{"I64": 21}, {"I64": 34}] } }
   ],
   "process": { "ref": { "content_id": "4e2d…" } },
   "seed": 1,