diff --git a/README.md b/README.md
index 1dfa085..bd74505 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ The app is configurable with environment variable and url parameters.
 | `YEAR` | `year` | String | The year to fetch. Example : `4` |
 | `GROUP` | `group` | String | The group to fetch. Example : `1` |
 | `ALLOWED_YEARS` | None | String | Used to validate year specified in URL params. Example : `3,4,5` |
-| `ALLOWED_GROUPS` | None | String | Used to validate group specified in URL params. Example : `1,2,3` |
+| `ALLOWED_GROUPS` | None | String | Used to validate group specified in URL params. Example : `1,2,3,4` |
 
 ## Example
 ### Default