diff --git a/README.md b/README.md
index a766987fb..21f7aa496 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,10 @@ Alert dashboard for
 Starting with karma v0.56 only Alertmanager V2 API is supported, which
 requires Alertmanager `>=0.17.0`.
 
+Alertmanager `>=0.19.0` is recommended as older versions might not show all
+receivers in karma, see
+[issue #812](https://github.com/prymitive/karma/issues/812) for details.
+
 ---
 
 See [GitHub Releases](https://github.com/prymitive/karma/releases) for release
@@ -65,7 +69,7 @@ grid, including an extra grid for alerts without that label present.
 Silence modal allows to create new silences and manage all silences already
 present in Alertmanager.
 Silence ACL rules can be used to control silence creation and editing, see
- [ACLs](/docs/ACLs.md) docs for more details.
+[ACLs](/docs/ACLs.md) docs for more details.
 
 ![Silence browser](/docs/img/silenceBrowser.png)