diff --git a/mode-customizations/ruby-mode.el b/mode-customizations/ruby-mode.el
index a33f5b8..870b9c9 100644
--- a/mode-customizations/ruby-mode.el
+++ b/mode-customizations/ruby-mode.el
@@ -58,8 +58,8 @@
 ;; Set up hs-mode (HideShow) for Ruby
 (add-to-list 'hs-special-modes-alist
              `(ruby-mode
-               ,(rx (or "def" "class" "module" "{" "[")) ; Block start
-               ,(rx (or "}" "]" "end"))                  ; Block end
+               ,(rx (or "def" "class" "module" "do")) ; Block start
+               ,(rx (or "end"))                  ; Block end
                ,(rx (or "#" "=begin"))                   ; Comment start
                ruby-forward-sexp nil))