diff --git a/README.md b/README.md
index ed18dc6..2e4e038 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,7 @@ Clone this repository or get the latest release at [https://kore.io/releases/4.1
 
 Requirements
 * openssl 1.1.1 or libressl 3.x
+(note: openssl 3.0.0 is currently *not* supported)
 
 Requirement for asynchronous curl (optional)
 * libcurl (7.64.0 or higher)