diff --git a/plug.vim b/plug.vim
index 8be364c..229053d 100644
--- a/plug.vim
+++ b/plug.vim
@@ -1904,6 +1904,8 @@ function! s:preview_commit()
   setlocal filetype=git buftype=nofile nobuflisted
   execute 'silent read !cd' s:shellesc(g:plugs[name].dir) '&& git show --pretty=medium' sha
   normal! gg"_dd
+  setlocal nomodifiable
+  nnoremap <silent> <buffer> q :q<cr>
   wincmd p
 endfunction