diff --git a/01.md b/01.md
index 70aae443..f5673b38 100644
--- a/01.md
+++ b/01.md
@@ -49,6 +49,8 @@ To prevent implementation differences from creating a different event ID for the
   - The line break, `0x0A`, as `\n`
   - A double quote, `0x22`, as `\"`
   - A backslash, `0x5C`, as `\\`
+  - A carriage return, `0x0D`, as `\r`
+  - A tab character, `0x09`, as `\t`
 - UTF-8 should be used for encoding.
 
 ## Communication between clients and relays