diff --git a/doc/outline.txt b/doc/outline.txt
index 7040bdb..15b3287 100644
--- a/doc/outline.txt
+++ b/doc/outline.txt
@@ -19,6 +19,8 @@ Table of Contents                                  *outline-table-of-contents*
 PREREQUISITES                                          *outline-prerequisites*
 
 - Neovim 0.7+
+    - To use modifiers on |outline-commands|, Neovim 0.8 is required.
+        Everything else works with Neovim 0.7.
 - Properly configured Neovim LSP client (otherwise only markdown is supported)