diff --git a/README.md b/README.md
index fed5a480be2d78127e19b46b6ad7d5d00bd3c02a..6bd6090e6e6b85c0cc0b1fcb0d055677d8dc67b4 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ You will find more information on the [Apache Log4j 2 Security Vulnerabilities](
 ### Download
 
 - [cve_2021_44228_log4j.mkp (main plugin for CMK 2.0)](/../../../-/raw/main/cve_2021_44228_log4j.mkp)
-- [log4j_executables-2020305.v3.0.1.mkp (scanner executables)](/../../../-/raw/main/log4j_executables-2020305.v3.0.1.mkp)
+- [log4j_executables-2020305.v3.0.1.mkp (scanner executables)](/../../../-/raw/main/log4j_executables-2020305.v3.0.1.mkp). **This package requires at least CMK 2.0.0p21**.
 
 - [cve_2021_44228_log4j_cmk16.mkp (plugin for CMK 1.6)](/../../../-/raw/main/cve_2021_44228_log4j_cmk16.mkp)
 
@@ -38,6 +38,8 @@ The direkt download is always the latest version, some times a prerelease.
 
 **Note**: before you update read the [CHANGELOG](CHANGELOG) please, and have a look at the [Releases](https://thl-cmk.hopto.org/gitlab/checkmk/vendor-independent/cve_2021_44228_log4j/-/releases), there might be unexpected changes.
 
+**Note**: As there was an issue with large ( >20MB) agent plugins and the cmk agent installer for Windows, you need to update your CMK system to CMK 2.0.0p21 or newer to use the latest version of this plugin.
+
 **IMPORTANT**: On CMK 2.0, if you update from pre _20220309.v0.1.4_ version, you need first to uninstall the _cve_2021_44228_log4j_ package. Then install the new _cve_2021_44228_log4j.mkp_ package and the _log4j_executables-2020305.v3.0.1.mkp_ package. For more information see _How to use_ and the release notes.
 
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