diff --git a/.exp-coc-config b/.exp-coc-config
index baeb8dd..9855c30 100644
--- a/.exp-coc-config
+++ b/.exp-coc-config
@@ -151,7 +151,7 @@ set statusline^=%{coc#status()}%{get(b:,'coc_current_function','')}
 " Show all diagnostics.
 nnoremap <silent><nowait> <space>a  :<C-u>CocList diagnostics<cr>
 " Manage extensions.
-nnoremap <silent><nowait> <space>e  :<C-u>CocList extensions<cr>
+" nnoremap <silent><nowait> <space>e  :<C-u>CocList extensions<cr>
 " Show commands.
 nnoremap <silent><nowait> <space>c  :<C-u>CocList commands<cr>
 " Find symbol of current document.
diff --git a/.vimrc b/.vimrc
index 1a51e1d..c6ca457 100644
--- a/.vimrc
+++ b/.vimrc
@@ -340,6 +340,10 @@
         exec "set t_PE=\e[201~"
     endif
 
+    " Tab navigation.
+    nnoremap <space>q :bprevious<CR>
+    nnoremap <space>e :bnext<CR>
+
 " Use bundles config {
     if filereadable(expand("~/.vimrc.bundles"))
         source ~/.vimrc.bundles