diff --git a/install.sh b/install.sh
index 214ad9a..570835e 100755
--- a/install.sh
+++ b/install.sh
@@ -6,7 +6,7 @@
 set -eu
 
 ARG1="$([ $# -eq 1 ] && echo "$1" || echo "")"
-has() { type "$1" > /dev/null 2>&1; }
+command_exists() { type "$1" >/dev/null 2>&1; }
 file_exists() { [ -f $1 ]; }
 dir_exists() { [ -d $1 ]; }
 is_update_mode() { [ "$ARG1" = "update" ] || [ "$ARG1" = "-u" ]; }
@@ -19,7 +19,7 @@ DOTDIR="$HOME/dotfiles"
 : "${XDG_DATA_HOME:="$HOME/.local/share"}"
 : "${ZDOTDIR:="$XDG_CONFIG_HOME/zsh"}"
 
-if ! has git; then
+if ! command_exists git; then
   warn "you must install git!"
   exit 1
 fi
diff --git a/scripts/check_requirements.sh b/scripts/check_requirements.sh
index 44d738a..3873925 100644
--- a/scripts/check_requirements.sh
+++ b/scripts/check_requirements.sh
@@ -2,7 +2,7 @@ check_requirements() {
   info "check requirements..."
 
   local is_every_requirement_met=true
-  if ! has nvim && ! file_exists "$HOME/local/nvim/bin/nvim"; then
+  if ! command_exists nvim && ! file_exists "$HOME/local/nvim/bin/nvim"; then
     warn "you must install neovim! please see installing-neovim : https://github.com/neovim/neovim/wiki/Installing-Neovim"
     is_every_requirement_met=false
   fi
@@ -18,7 +18,7 @@ check_requirements() {
     cd -
   fi
 
-  if ! has zsh; then
+  if ! command_exists zsh; then
     warn "zsh isn't installed"
     is_every_requirement_met=false
   else
@@ -33,7 +33,7 @@ check_requirements() {
     fi
   fi
 
-  if ! has tmux; then
+  if ! command_exists tmux; then
     warn "tmux isn't installed"
     is_every_requirement_met=false
   else
diff --git a/scripts/deploy.sh b/scripts/deploy.sh
index fefc1cf..c829451 100644
--- a/scripts/deploy.sh
+++ b/scripts/deploy.sh
@@ -44,7 +44,7 @@ deploy() {
   symlink starship.toml "$XDG_CONFIG_HOME/starship.toml"
   mkdir -p "$XDG_DATA_HOME/rustup"
 
-  if has ranger && ! dir_exists "$DOTDIR/ranger/plugins/ranger_devicons"; then
+  if command_exists ranger && ! dir_exists "$DOTDIR/ranger/plugins/ranger_devicons"; then
     git clone https://github.com/alexanderjeurissen/ranger_devicons "$DOTDIR/ranger/plugins/ranger_devicons"
     cd "$DOTDIR/ranger/plugins/ranger_devicons"
     make install