diff --git a/README.md b/README.md
index d2e9831..fbe67d4 100644
--- a/README.md
+++ b/README.md
@@ -58,10 +58,16 @@ Similarly, if there is a `format` field set to `uuid`:
 And if there are any websocket channel endpoints:
 ```diff
 [dependencies]
-+base64 = "0.13"
++base64 = "0.21"
 +rand = "0.8"
 ```
 
+If types include regular expression validation:
+```diff
+[dependencies]
++regress = "0.4.1"
+```
+
 The macro has some additional fancy options to control the generated code:
 
 ```rust