diff --git a/README.md b/README.md
index 8740da4..5e1cdb8 100644
--- a/README.md
+++ b/README.md
@@ -1145,7 +1145,7 @@ The executable is at: /bin/just
 
 - `quote(s)` - Replace all single quotes with `'\''` and prepend and append single quotes to `s`. This is sufficient to escape special characters for many shells, including most Bourne shell descendants.
 - `replace(s, from, to)` - Replace all occurrences of `from` in `s` to `to`.
-- `replace_regex(s, regex, replacement)` - Replace all occurrences of `regex` in `s` to `replacement`.
+- `replace_regex(s, regex, replacement)` - Replace all occurrences of `regex` in `s` to `replacement`. Regular expressions are provided by the [Rust `regex` crate](https://docs.rs/regex/latest/regex/). See the [syntax documentation](https://docs.rs/regex/latest/regex/#syntax) for usage examples.
 - `trim(s)` - Remove leading and trailing whitespace from `s`.
 - `trim_end(s)` - Remove trailing whitespace from `s`.
 - `trim_end_match(s, pat)` - Remove suffix of `s` matching `pat`.
@@ -1167,7 +1167,6 @@ The executable is at: /bin/just
 - `uppercamelcase(s)`<sup>1.7.0</sup> - Convert `s` to `UpperCamelCase`.
 - `uppercase(s)` - Convert `s` to uppercase.
 
-
 #### Path Manipulation
 
 ##### Fallible