diff --git a/lisp/mitch-packages.el b/lisp/mitch-packages.el
index 42737a9..2eeeec5 100644
--- a/lisp/mitch-packages.el
+++ b/lisp/mitch-packages.el
@@ -857,6 +857,12 @@ See https://emacs.stackexchange.com/questions/2538/how-to-define-additional-mode
 
 ;; see https://www.reddit.com/r/emacs/comments/xyo2fo/orgmode_vterm_tmux/
 (use-package ob-tmux
+  :after (org dash)
+  :config
+  (setq org-src-lang-modes (-replace
+			    '("tmux" . sh)
+			    '("tmux" . powershell)
+			    org-src-lang-modes))
   :custom
   (org-babel-default-header-args:tmux
    '((:results . "display")
@@ -864,7 +870,7 @@ See https://emacs.stackexchange.com/questions/2538/how-to-define-additional-mode
      (:socket  . nil)))
   (org-babel-tmux-session-prefix "ob-")
   (org-babel-tmux-terminal "/home/mitch/.local/bin/emacs-term-shim.sh")
-  (org-babel-tmux-terminal-opts nil))
+  (org-babel-tmux-terminal-opts))
 
 (provide 'mitch-packages)
 ;;; mitch-packages.el ends here