diff --git a/vimrc b/vimrc
index 2c23fd0..611b122 100644
--- a/vimrc
+++ b/vimrc
@@ -72,8 +72,15 @@ nnoremap <c-/> gc
 
 " save all and quit
 nnoremap <leader>q :wa<cr>ZQ
+
+function! RunBlackIfInPythonFile()
+  if &filetype ==# 'python'
+    :call Black()
+  endif
+endfunction
+
 " save
-nnoremap <c-s> :w<cr>
+nnoremap <c-s> :call RunBlackIfInPythonFile()<cr>:w<cr>
 " save and close buffer
 nnoremap <leader>w :w<cr>:bw<cr>
 nnoremap <c-h> :bp<cr>
@@ -82,7 +89,7 @@ nnoremap <c-l> :bn<cr>
 nnoremap <c-e> :noh<cr>
 nnoremap <leader>p :PlugInstall<cr>
 
-nnoremap <buffer><silent> <leader>f <cmd>call Black()<cr>
+nnoremap <leader>b :call RunBlackIfInPythonFile()<cr>
 
 " show number of lines in buffer
 nnoremap <leader>l :echo line("$")<cr>
@@ -90,6 +97,14 @@ nnoremap <leader>l :echo line("$")<cr>
 " quickly source vimrc with <space> + s
 nnoremap <leader>s :source ~/.vimrc<cr>
 
+" move selection
+nnoremap <C-j> :m .+1<CR>==
+nnoremap <C-k> :m .-2<CR>==
+inoremap <C-j> <ESC>:m .+1<CR>==gi
+inoremap <C-k> <ESC>:m .-2<CR>==gi
+vnoremap <C-j> :m '>+1<CR>gv=gv
+vnoremap <C-k> :m '<-2<CR>gv=gv
+
 let g:python3_host_prog = $HOME . '/.local/venv/nvim/bin/python'
 let g:black#settings = {
     \ 'fast': 1,