diff --git a/bin/update b/bin/update
index 5795623..87a4361 100755
--- a/bin/update
+++ b/bin/update
@@ -60,30 +60,30 @@ _check_date_file() {
 }
 
 _sentence() {
-    subject0=("Your" "The" "This")
-    subject1=("system" "machine" "pc" "computer")
-    adjective=("awesome" "incredible" "amazing" "brave" "hard working" "loyal" "nice" "polite" "powerful" "pro-active" "reliable" "fabulous" "fantastic" "incredible" "outstanding" "remarkable" "spectacular" "splendid" "super" "happy" "cheerful")
-    verb=("is" "seems" "looks" "appears to be")
-    no_verb=("is not" "doesn't seem" "doesn't look" "appears not to be")
-    adverb=("up-to-date" "ready" "updated")
-    dot=("." "!" "...")
+    local subject0=("Your" "The" "This")
+    local subject1=("system" "machine" "pc" "computer")
+    local adjective=("awesome" "incredible" "amazing" "brave" "hard working" "loyal" "nice" "polite" "powerful" "pro-active" "reliable" "fabulous" "fantastic" "incredible" "outstanding" "remarkable" "spectacular" "splendid" "super" "happy" "cheerful")
+    local verb=("is" "seems" "looks" "appears to be")
+    local no_verb=("is not" "doesn't seem" "doesn't look" "appears not to be")
+    local adverb=("up-to-date" "ready" "updated")
+    local dot=("." "!" "...")
 
-    n_subject0=`shuf -i0-"$((${#subject0[@]}-1))" -n1`
-    n_subject1=`shuf -i0-"$((${#subject1[@]}-1))" -n1`
-    n_adjective=`shuf -i0-"$((${#adjective[@]}-1))" -n1`
-    n_adverb=`shuf -i0-"$((${#adverb[@]}-1))" -n1`
-    n_dot=`shuf -i0-"$((${#dot[@]}-1))" -n1`
+    local n_subject0=`shuf -i0-"$((${#subject0[@]}-1))" -n1`
+    local n_subject1=`shuf -i0-"$((${#subject1[@]}-1))" -n1`
+    local n_adjective=`shuf -i0-"$((${#adjective[@]}-1))" -n1`
+    local n_adverb=`shuf -i0-"$((${#adverb[@]}-1))" -n1`
+    local n_dot=`shuf -i0-"$((${#dot[@]}-1))" -n1`
 
     if [ $1 = "updated" ];  then
-        color="32"
-        n_verb=`shuf -i0-"$((${#verb[@]}-1))" -n1`
-        s_verb=${verb[$n_verb]}
-        end=""
+        local color="32"
+        local n_verb=`shuf -i0-"$((${#verb[@]}-1))" -n1`
+        local s_verb=${verb[$n_verb]}
+        local end=""
     elif [ $1 = "not_updated" ]; then
-        color="31"
-        n_verb=`shuf -i0-"$((${#no_verb[@]}-1))" -n1`
-        s_verb=${no_verb[$n_verb]}
-        end="Run \`update\` to update your system."
+        local color="31"
+        local n_verb=`shuf -i0-"$((${#no_verb[@]}-1))" -n1`
+        local s_verb=${no_verb[$n_verb]}
+        local end="Run \`update\` to update your system."
     fi
 
     echo -e "\033[$color;1m${subject0[$n_subject0]} ${adjective[$n_adjective]} ${subject1[$n_subject1]} $s_verb ${adverb[$n_adverb]}${dot[$n_dot]} ${end}\033[0m"
@@ -93,8 +93,8 @@ _check_date() {
 
     _check_date_file
 
-    old_date=`cat ~/.config/dotfiles/.data/update_date`
-    new_date=`date $1`
+    local old_date=`cat ~/.config/dotfiles/.data/update_date`
+    local new_date=`date $1`
 
     if [ "$new_date" != "$old_date" ]; then
         _sentence not_updated
@@ -119,7 +119,7 @@ update-system() {
     fi
 
     echo -e "\033[32;1m=== Updating system ===\033[0m"
-    start_system_update=`date +%s`
+    local start=`date +%s`
 
     # Debian based systems
     command -v apt > /dev/null 2>&1
@@ -153,8 +153,8 @@ update-system() {
         sudo dnf upgrade
     fi
 
-    seconds=$((`date +%s` - $start_system_update ))
-    formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
+    local seconds=$((`date +%s` - $start))
+    local formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
     echo -e "\033[32;1m=== System updated in $formatted ===\033[0m"
 }
 
@@ -166,7 +166,7 @@ update-rust() {
         return
     fi
 
-    start_rust_update=`date +%s`
+    local start=`date +%s`
     echo -e "\033[32;1m=== Updating rustup ===\033[0m"
     rustup self update
 
@@ -180,7 +180,7 @@ update-rust() {
 
         # This program requires openssl, so check that it is installed
         pkg-config --libs --cflags openssl > /dev/null 2>&1
-        installed_openssl=$?
+        local installed_openssl=$?
 
         # We need to install openssl
         if [ $installed_openssl -ne 0 ]; then
@@ -227,8 +227,8 @@ update-rust() {
         cargo install-update -ag
     fi
 
-    seconds=$((`date +%s` - $start_rust_update ))
-    formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
+    local seconds=$((`date +%s` - $start))
+    local formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
     echo -e "\033[32;1m=== Rust updated in $formatted ===\033[0m"
 
 }
@@ -240,12 +240,12 @@ update-wasm() {
     fi
 
     echo -e "\033[32;1m=== Updating wasmer ===\033[0m"
-    start_wasm_update=`date +%s`
+    local start=`date +%s`
 
     wasmer self-update
 
-    seconds=$((`date +%s` - $start_wasm_update ))
-    formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
+    local seconds=$((`date +%s` - $start))
+    local formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
     echo -e "\033[32;1m=== Wasm updated in $formatted ===\033[0m"
 }
 
@@ -261,19 +261,19 @@ update-npm() {
         return
     fi
 
-    start_npm_update=`date +%s`
+    local start=`date +%s`
     echo -e "\033[32;1m=== Updating node packages ===\033[0m"
     npm update -g
 
-    seconds=$((`date +%s` - $start_npm_update ))
-    formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
+    local seconds=$((`date +%s` - $start))
+    local formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
     echo -e "\033[32;1m=== Node packages updated in $formatted ===\033[0m"
 }
 
 update-dotfiles() {
-    start_dotfiles_update=`date +%s`
+    local start=`date +%s`
 
-    current_dir=$PWD
+    local current_dir=$PWD
 
     echo -e "\033[32;1m=== Updating dotfiles ===\033[0m"
     cd ~/.config/dotfiles && git pull
@@ -290,8 +290,8 @@ update-dotfiles() {
 
     cd $current_dir
 
-    seconds=$((`date +%s` - $start_dotfiles_update ))
-    formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
+    local seconds=$((`date +%s` - $start))
+    local formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
     echo -e "\033[32;1m=== Dotfiles updated in $formatted ===\033[0m"
 }
 
@@ -301,13 +301,13 @@ update-neovim() {
         return
     fi
 
-    start_neovim_update=`date +%s`
+    local start=`date +%s`
     echo -e "\033[32;1m=== Updating neovim packages ===\033[0m"
 
     nvim +PlugUpdate +qall
 
-    seconds=$((`date +%s` - $start_neovim_update ))
-    formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
+    local seconds=$((`date +%s` - $start))
+    local formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
     echo -e "\033[32;1m=== Neovim updated in $formatted ===\033[0m"
 }
 
@@ -402,7 +402,7 @@ main() {
             return $?
         fi
 
-        start=`date +%s`
+        local start=`date +%s`
         echo -e "\033[32;1m=== Starting full update ===\033[0m"
 
         # Update the system
@@ -433,8 +433,8 @@ main() {
         update-postpone
 
         _check_running
-        seconds=$((`date +%s` - $start ))
-        formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
+        local seconds=$((`date +%s` - $start ))
+        local formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
         echo -e "\033[32;1m=== Update finished in $formatted ===\033[0m"
 
         _check_running