diff --git a/doc/howto/pry.md b/doc/howto/pry.md
index 87247aed0f3af25d38a9a277f652fe0610cd4c20..009cc8ba0a218f56ff1f74c94366dfd3e7dddb06 100644
--- a/doc/howto/pry.md
+++ b/doc/howto/pry.md
@@ -15,3 +15,8 @@ Unicorn is not compatible with Pry.
 Then launch GDK as usual (e.g. with `gdk run`) and in a separate
 terminal run: `gdk run thin`. Your Pry prompts will appear in the window
 that runs Thin.
+
+There is an [open
+issue](https://gitlab.com/gitlab-org/gitlab-development-kit/issues/183)
+about `gdk run thin` not allowing concurrent requests. This breaks
+features like the web editor.