diff --git a/applications/Omakub.sh b/applications/Omakub.sh
index d354d37c..550c25df 100644
--- a/applications/Omakub.sh
+++ b/applications/Omakub.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 cat <<EOF >~/.local/share/applications/Omakub.desktop
 [Desktop Entry]
 Version=1.0
diff --git a/install/app-neovim.sh b/install/app-neovim.sh
index 44e41f9e..70aaf36b 100644
--- a/install/app-neovim.sh
+++ b/install/app-neovim.sh
@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 
-cd /tmp
+cd /tmp || exit
 wget -O nvim.tar.gz "https://github.com/neovim/neovim/releases/latest/download/nvim-linux64.tar.gz"
 tar -xf nvim.tar.gz
 sudo install nvim-linux64/bin/nvim /usr/local/bin/nvim
diff --git a/install/apps-desktop.sh b/install/apps-desktop.sh
index c4ccf6cb..e844caba 100644
--- a/install/apps-desktop.sh
+++ b/install/apps-desktop.sh
@@ -1 +1,4 @@
-for script in ~/.local/share/omakub/applications/*.sh; do source $script; done
+#!/usr/bin/env bash
+
+# shellcheck disable=SC1090
+for script in ~/.local/share/omakub/applications/*.sh; do source "$script"; done
diff --git a/install/optional/app-steam.sh b/install/optional/app-steam.sh
index 38c31e16..69202e2f 100755
--- a/install/optional/app-steam.sh
+++ b/install/optional/app-steam.sh
@@ -1,6 +1,8 @@
-cd /tmp
+#!/usr/bin/env bash
+
+cd /tmp || exit
 wget https://cdn.akamai.steamstatic.com/client/installer/steam.deb
 sudo apt install -y ./steam.deb
 sudo apt-get install --no-remove -oAPT::Get::AutomaticRemove=false libc6:amd64 libc6:i386 libegl1:amd64 libegl1:i386 libgbm1:amd64 libgbm1:i386 libgl1-mesa-dri:amd64 libgl1-mesa-dri:i386 libgl1:amd64 libgl1:i386 steam-libs-amd64:amd64
 rm steam.deb
-cd -
+cd - || exit
diff --git a/themes/chrome/catppuccin.sh b/themes/chrome/catppuccin.sh
index 4b9904a9..dfa13109 100644
--- a/themes/chrome/catppuccin.sh
+++ b/themes/chrome/catppuccin.sh
@@ -1,4 +1,6 @@
-cd ~/.config/google-chrome/Default
+#!/usr/bin/env bash
+
+cd "$HOME/.config/google-chrome/Default" || exit
 jq '.browser.theme.color_scheme = 2 | .browser.theme.color_variant = 1 | .browser.theme.user_color = 1579044' Preferences >tmp.json && mv tmp.json Preferences
 jq '.ntp += {"custom_background_dict":{"background_url": "https://github.com/basecamp/omakub/blob/master/backgrounds/catppuccintotoro.png?raw=true"}}' Preferences >tmp.json && mv tmp.json Preferences
-cd ~
+cd "$HOME" || exit
diff --git a/themes/chrome/everforest.sh b/themes/chrome/everforest.sh
index 50302c25..01cf9983 100644
--- a/themes/chrome/everforest.sh
+++ b/themes/chrome/everforest.sh
@@ -1,4 +1,6 @@
-cd ~/.config/google-chrome/Default
+#!/usr/bin/env bash
+
+cd "$HOME/.config/google-chrome/Default" || exit
 jq '.browser.theme.color_scheme = 2 | .browser.theme.color_variant = 2 | .browser.theme.user_color = -7829368' Preferences >tmp.json && mv tmp.json Preferences
 jq '.ntp += {"custom_background_dict":{"background_url": "https://github.com/basecamp/omakub/blob/master/backgrounds/fog_forest_2.jpg?raw=true"}}' Preferences >tmp.json && mv tmp.json Preferences
-cd ~
+cd "$HOME" || exit
diff --git a/themes/chrome/gruvbox.sh b/themes/chrome/gruvbox.sh
index 0d9d51fa..07705748 100644
--- a/themes/chrome/gruvbox.sh
+++ b/themes/chrome/gruvbox.sh
@@ -1,4 +1,6 @@
-cd ~/.config/google-chrome/Default
+#!/usr/bin/env bash
+
+cd "$HOME/.config/google-chrome/Default" || exit
 jq '.browser.theme.color_scheme = 2 | .browser.theme.color_variant = 2 | .browser.theme.user_color = -8847616' Preferences >tmp.json && mv tmp.json Preferences
 jq '.ntp += {"custom_background_dict":{"background_url": "https://github.com/basecamp/omakub/blob/master/backgrounds/ferns-green.jpg?raw=true"}}' Preferences >tmp.json && mv tmp.json Preferences
-cd ~
+cd "$HOME" || exit
diff --git a/themes/chrome/kanagawa.sh b/themes/chrome/kanagawa.sh
index b2427bed..714b0b8c 100644
--- a/themes/chrome/kanagawa.sh
+++ b/themes/chrome/kanagawa.sh
@@ -1,4 +1,6 @@
-cd ~/.config/google-chrome/Default
+#!/usr/bin/env bash
+
+cd "$HOME/.config/google-chrome/Default" || exit
 jq '.browser.theme.color_scheme = 1 | .browser.theme.color_variant = 1 | .browser.theme.user_color = 6632704' Preferences >tmp.json && mv tmp.json Preferences
 jq '.ntp += {"custom_background_dict":{"background_url": "https://github.com/basecamp/omakub/blob/master/backgrounds/kanagawa.jpg?raw=true"}}' Preferences >tmp.json && mv tmp.json Preferences
-cd ~
+cd "$HOME" || exit
diff --git a/themes/chrome/nord.sh b/themes/chrome/nord.sh
index 279c9bd7..03022870 100644
--- a/themes/chrome/nord.sh
+++ b/themes/chrome/nord.sh
@@ -1,4 +1,6 @@
-cd ~/.config/google-chrome/Default
+#!/usr/bin/env bash
+
+cd "$HOME/.config/google-chrome/Default" || exit
 jq '.browser.theme.color_scheme = 2 | .browser.theme.color_variant = 2 | .browser.theme.user_color = 5002858' Preferences >tmp.json && mv tmp.json Preferences
 jq '.ntp += {"custom_background_dict":{"background_url": "https://github.com/basecamp/omakub/blob/master/backgrounds/nord_scenary.png?raw=true"}}' Preferences >tmp.json && mv tmp.json Preferences
-cd ~
+cd "$HOME" || exit
diff --git a/themes/chrome/rose-pine.sh b/themes/chrome/rose-pine.sh
index d51c7a28..9cd92fe3 100644
--- a/themes/chrome/rose-pine.sh
+++ b/themes/chrome/rose-pine.sh
@@ -1,4 +1,6 @@
-cd ~/.config/google-chrome/Default
+#!/usr/bin/env bash
+
+cd "$HOME/.config/google-chrome/Default" || exit
 jq '.browser.theme.color_scheme = 1 | .browser.theme.color_variant = 1 | .browser.theme.user_color = -65281' Preferences >tmp.json && mv tmp.json Preferences
 jq '.ntp += {"custom_background_dict":{"background_url": "https://github.com/basecamp/omakub/blob/master/backgrounds/simple-pastel-by-triarts-from-freepik.jpg?raw=true"}}' Preferences >tmp.json && mv tmp.json Preferences
-cd ~
+cd "$HOME" || exit
diff --git a/themes/chrome/tokyo-night.sh b/themes/chrome/tokyo-night.sh
index 8f9965b3..9e60ff17 100644
--- a/themes/chrome/tokyo-night.sh
+++ b/themes/chrome/tokyo-night.sh
@@ -1,4 +1,6 @@
-cd ~/.config/google-chrome/Default
+#!/usr/bin/env bash
+
+cd "$HOME/.config/google-chrome/Default" || exit
 jq '.browser.theme.color_scheme = 2 | .browser.theme.color_variant = 1 | .browser.theme.user_color = 3094106' Preferences >tmp.json && mv tmp.json Preferences
 jq '.ntp += {"custom_background_dict":{"background_url": "https://github.com/basecamp/omakub/blob/master/backgrounds/80s-retro-tropical-sunset-by-freepik.jpg?raw=true"}}' Preferences >tmp.json && mv tmp.json Preferences
-cd ~
+cd "$HOME" || exit
diff --git a/uninstall/app-signal.sh b/uninstall/app-signal.sh
index b7ceb44a..8df09c67 100644
--- a/uninstall/app-signal.sh
+++ b/uninstall/app-signal.sh
@@ -1 +1,3 @@
+#!/usr/bin/env bash
+
 sudo apt remove --purge -y signal-desktop
diff --git a/uninstall/app-steam.sh b/uninstall/app-steam.sh
index 54bacc13..5f4ed55c 100644
--- a/uninstall/app-steam.sh
+++ b/uninstall/app-steam.sh
@@ -1 +1,3 @@
+#!/usr/bin/env bash
+
 sudo apt remove -y steam steam-launcher
diff --git a/uninstall/php.sh b/uninstall/php.sh
index da7db13f..a72d831f 100644
--- a/uninstall/php.sh
+++ b/uninstall/php.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 sudo apt -y purge "php8.3*"
 sudo add-apt-repository -y --remove ppa:ondrej/php