diff --git a/editions/tw5.com/tiddlers/concepts/TiddlerFields.tid b/editions/tw5.com/tiddlers/concepts/TiddlerFields.tid
index 0f9b830a7..342c04280 100644
--- a/editions/tw5.com/tiddlers/concepts/TiddlerFields.tid
+++ b/editions/tw5.com/tiddlers/concepts/TiddlerFields.tid
@@ -1,11 +1,11 @@
 created: 20130825213300000
-modified: 20220109101407050
+modified: 20240416103247799
 tags: Concepts
 title: TiddlerFields
 type: text/vnd.tiddlywiki
 
 \define lingo-base() $:/language/Docs/Fields/
-~TiddlerFields are name:value pairs that make up a [[tiddler|Tiddlers]]. Field names must be lowercase letters, digits or the characters `-` (dash), `_` (underscore) and `.` (period).
+~TiddlerFields are name:value pairs that make up a [[tiddler|Tiddlers]]. Field names may contain any combination of characters (prior to [[v5.2.0|Release 5.2.0]], fields were constrained to be lowercase letters, digits or the characters `-` (dash), `_` (underscore) and `.` (period)).
 
 The standard fields are: