diff --git a/data-types/struct/README.md b/data-types/struct/README.md
index 2fcefa3..58cce1d 100644
--- a/data-types/struct/README.md
+++ b/data-types/struct/README.md
@@ -268,7 +268,9 @@ Variable-length codecs (e.g. `vlen-utf8`) are not compatible with the
 
 ## Change log
 
-No changes yet.
+- Relaxed the JSON schema to permit field data types declared as a JSON
+  object without a `configuration` key, e.g. `{"name": "float64"}`
+  ([#63](https://github.com/zarr-developers/zarr-extensions/pull/63)).
 
 ## Current maintainers
 
diff --git a/data-types/struct/schema.json b/data-types/struct/schema.json
index a12c92d..471c0ac 100644
--- a/data-types/struct/schema.json
+++ b/data-types/struct/schema.json
@@ -19,7 +19,7 @@
               "type": "object"
             }
           },
-          "required": ["name", "configuration"],
+          "required": ["name"],
           "additionalProperties": false
         }
       ]