diff --git a/README.md b/README.md
index d77279f9..10837154 100644
--- a/README.md
+++ b/README.md
@@ -330,15 +330,18 @@ You can modify endpoints by configuring `access.endpoints` in your config:
 settings:
   access:
     endpoints:
-      - !/v1/register
-      - !/v1/unregister
-      - !/v1/qrcodelink
-      - !/v1/contacts
+      - "!/v1/register"
+      - "!/v1/unregister"
+      - "!/v1/qrcodelink"
+      - "!/v1/contacts"
       - /v2/send
 ```
 
 By default adding an endpoint explictly allows access to it, use `!` to block it instead.
 
+> [!IMPORTANT]
+> When using `!` to block you must enclose the endpoint with quotes, like in the example above.
+
 | Config (Allow) | (Block)        |   Result   |     |                   |     |
 | :------------- | :------------- | :--------: | --- | :---------------: | --- |
 | `/v2/send`     | `unset`        |  **all**   | 🛑  |  **`/v2/send`**   | ✅  |