diff --git a/common_shell_functions b/common_shell_functions
index 2f9296d..b9ce9cf 100644
--- a/common_shell_functions
+++ b/common_shell_functions
@@ -119,5 +119,5 @@ function flocate() {
 #################### OS Initialization Tools ###################
 function debian_init() {
     sudo apt-get update
-    sudo apt-get install -y tmux vim curl
+    sudo apt-get install -y tmux vim curl zsh
 }
diff --git a/vimrc b/vimrc
index a9e5e05..eb2a1ce 100644
--- a/vimrc
+++ b/vimrc
@@ -168,7 +168,10 @@ nnoremap <C-h> <C-w>h
 nnoremap <C-j> <C-w>j
 nnoremap <C-k> <C-w>k
 nnoremap <C-l> <C-w>l
-tnoremap <C-h> <C-w>h
-tnoremap <C-j> <C-w>j
-tnoremap <C-k> <C-w>k
-tnoremap <C-l> <C-w>l
+
+if v:version > 800
+    tnoremap <C-h> <C-w>h
+    tnoremap <C-j> <C-w>j
+    tnoremap <C-k> <C-w>k
+    tnoremap <C-l> <C-w>l
+endif