diff --git a/docs/main/prerequisites.md b/docs/main/prerequisites.md
index 630723b..ee0edeb 100644
--- a/docs/main/prerequisites.md
+++ b/docs/main/prerequisites.md
@@ -25,8 +25,8 @@ The following operating systems are **officially** supported:
 | Distribution | Release          | Architecture        |
 | ------------ | ---------------- | ------------------- |
 | Raspberry Pi OS <br>(formerly Raspbian)     | Stretch / Buster | ARM                 |
-| Ubuntu       | 16.x / 18.x / 20.x      | ARM / x86_64        |
-| Debian       | 9 / 10           | ARM / x86_64 / i386 |
+| Ubuntu       | 16.x / 18.x / 20.x /21.x     | ARM / x86_64        |
+| Debian       | 9 / 10 /11          | ARM / x86_64 / i386 |
 | Fedora       | 32 / 33          | ARM / x86_64        |
 | CentOS       | 7 / 8            | x86_64              |