diff --git a/documentation/index.rst b/documentation/index.rst
index 7f3ea1d5..523c4756 100644
--- a/documentation/index.rst
+++ b/documentation/index.rst
@@ -80,6 +80,10 @@ Currently, the following external solvers can be interfaced:
 Current features
 ----------------
 
+.. warning:
+
+    Handling quadraric expressions still is an experimental feature and extreme care should be taken if used.
+
 Interfacing external optimization solvers
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^