diff --git a/README.md b/README.md
index 0b04c90..eaeb53f 100644
--- a/README.md
+++ b/README.md
@@ -86,7 +86,7 @@ more secure. In particular:
   or avoid being tricked by a `/proc` that is not legitimate. This is done
   using [`openat2`][openat2.2] for all users, and privileged users will also be
   further protected by using [`fsopen`][fsopen.2] and [`open_tree`][open_tree.2]
-  (Linux 4.18 or later).
+  (Linux 5.2 or later).
 
 [openat2.2]: https://www.man7.org/linux/man-pages/man2/openat2.2.html
 [fsopen.2]: https://github.com/brauner/man-pages-md/blob/main/fsopen.md