diff --git a/specs/simple-serialize.md b/specs/simple-serialize.md
index c9f845873..2d9b715b3 100644
--- a/specs/simple-serialize.md
+++ b/specs/simple-serialize.md
@@ -32,7 +32,7 @@ This is a **work in progress** describing typing, serialization and Merkleizatio
 * `"bool"`: `True` or `False`
 * `"null"`: `None`
 
-The type `"null"` is only legal as one of several type in a `union` type.
+The `"null"` type is only legal as a union sub-type.
 
 ### Composite types
 
@@ -108,7 +108,6 @@ serialized_type_index = value.type_index.to_bytes(BYTES_PER_LENGTH_PREFIX, "litt
 return serialized_type_index + serialized_bytes
 ```
 
-
 ## Deserialization
 
 Because serialization is an injective function (i.e. two distinct objects of the same type will serialize to different values) any bytestring has at most one object it could deserialize to. Efficient algorithms for computing this object can be found in [the implementations](#implementations).