diff --git a/01.md b/01.md
index 708579c..183b042 100644
--- a/01.md
+++ b/01.md
@@ -42,7 +42,7 @@ To obtain the `event.id`, we `sha256` the serialized event. The serialization is
 ]
 ```
 
-Once the `sha256` is computed, replace the first 4 bytes of the hash byte array by the 4-byte, signed, little-endian representation of the `created_at`. When verifying the event, Clients MUST check if the `id` matches the full hash OR the sorted hash.
+Once the `sha256` is computed, replace the first 4 bytes of the hash byte array by the 4-byte, unsigned, big-endian representation of the `created_at`. When verifying the event, Clients MUST check if the `id` matches the full hash OR the sorted hash.
 
 To prevent implementation differences from creating a different event ID for the same event, the following rules MUST be followed while serializing:
 - UTF-8 should be used for encoding.