diff --git a/plantuml-mode.el b/plantuml-mode.el
index 333510a..dc9d384 100644
--- a/plantuml-mode.el
+++ b/plantuml-mode.el
@@ -486,14 +486,14 @@ Uses prefix (as PREFIX) to choose where to display it:
 Plantuml elements like skinparam, rectangle, sprite, package, etc.
 The opening { has to be the last visible character in the line (whitespace
 might follow).")
-      (defvar plantuml-indent-regexp-note-start "^\s*\\(floating\s+\\)?[hr]?note[^:]*?$" "simplyfied regex; note syntax is especially inconsistent across diagrams")
+      (defvar plantuml-indent-regexp-note-start "^\s*\\(floating\s+\\)?[hr]?note\s+\\(right\\|left\\|top\\|bottom\\|over\\)[^:]*?$" "simplyfied regex; note syntax is especially inconsistent across diagrams")
       (defvar plantuml-indent-regexp-group-start "^\s*\\(alt\\|else\\|opt\\|loop\\|par\\|break\\|critical\\|group\\)\\(?:\s+.+\\|$\\)"
         "Indentation regex for plantuml group elements that are defined for sequence diagrams.
 Two variants for groups: keyword is either followed by whitespace and some text
 or it is followed by line end.")
       (defvar plantuml-indent-regexp-activate-start "^\s*activate\s+.+$")
       (defvar plantuml-indent-regexp-box-start "^\s*box\s+.+$")
-      (defvar plantuml-indent-regexp-ref-start "^ref\s+over\s+[^:]+?$")
+      (defvar plantuml-indent-regexp-ref-start "^\s*ref\s+over\s+[^:]+?$")
       (defvar plantuml-indent-regexp-title-start "^\s*title$")
       (defvar plantuml-indent-regexp-header-start "^\s*\\(?:\\(?:center\\|left\\|right\\)\s+header\\|header\\)$")
       (defvar plantuml-indent-regexp-footer-start "^\s*\\(?:\\(?:center\\|left\\|right\\)\s+footer\\|footer\\)$")