diff --git a/install.sh b/install.sh
index 62dccc33c..a3436eeb0 100755
--- a/install.sh
+++ b/install.sh
@@ -1,24 +1,24 @@
 #!/usr/bin/env bash
 cd "$(dirname "$0")"
 export base="$(pwd)"
-source ./scriptdata/environment-variables
-source ./scriptdata/functions
-source ./scriptdata/installers
-source ./scriptdata/options
+source ./scriptdata/environment-variables.sh
+source ./scriptdata/functions.sh
+source ./scriptdata/installers.sh
+source ./scriptdata/options.sh
 
 prevent_sudo_or_root
 set -e
 
 #####################################################################################
 # 0. Before we start
-source ./scriptdata/install-greeting
+source ./scriptdata/install-greeting.sh
 #####################################################################################
 printf "${COLOR_CYAN}[$0]: 1. Install dependencies\n${COLOR_RESET}"
 # TODO: if `--via-nix` is specified, source `install-deps-nix` instead.
-source ./scriptdata/install-deps-arch
+source ./scriptdata/install-deps-arch.sh
 #####################################################################################
 printf "${COLOR_CYAN}[$0]: 2. Setup for user groups/services etc\n${COLOR_RESET}"
-source ./scriptdata/install-setups
+source ./scriptdata/install-setups.sh
 #####################################################################################
 printf "${COLOR_CYAN}[$0]: 3. Copying + Configuring\n${COLOR_RESET}"
-source ./scriptdata/install-files
+source ./scriptdata/install-files.sh
diff --git a/manual-install-helper.sh b/manual-install-helper.sh
index 7f92a7aae..7ea34ebee 100755
--- a/manual-install-helper.sh
+++ b/manual-install-helper.sh
@@ -5,9 +5,9 @@
 
 cd "$(dirname "$0")"
 export base="$(pwd)"
-source ./scriptdata/environment-variables
-source ./scriptdata/functions
-source ./scriptdata/installers
+source ./scriptdata/environment-variables.sh
+source ./scriptdata/functions.sh
+source ./scriptdata/installers.sh
 prevent_sudo_or_root
 
 if command -v pacman >/dev/null 2>&1;then printf "${COLOR_RED}[$0]: pacman found, it seems that the system is ArchLinux or Arch-based distro. Aborting...${COLOR_RESET}\n";exit 1;fi
diff --git a/scriptdata/environment-variables b/scriptdata/environment-variables.sh
similarity index 100%
rename from scriptdata/environment-variables
rename to scriptdata/environment-variables.sh
diff --git a/scriptdata/functions b/scriptdata/functions.sh
similarity index 100%
rename from scriptdata/functions
rename to scriptdata/functions.sh
diff --git a/scriptdata/install-deps-arch b/scriptdata/install-deps-arch.sh
similarity index 100%
rename from scriptdata/install-deps-arch
rename to scriptdata/install-deps-arch.sh
diff --git a/scriptdata/install-files b/scriptdata/install-files.sh
similarity index 100%
rename from scriptdata/install-files
rename to scriptdata/install-files.sh
diff --git a/scriptdata/install-greeting b/scriptdata/install-greeting.sh
similarity index 100%
rename from scriptdata/install-greeting
rename to scriptdata/install-greeting.sh
diff --git a/scriptdata/install-setups b/scriptdata/install-setups.sh
similarity index 100%
rename from scriptdata/install-setups
rename to scriptdata/install-setups.sh
diff --git a/scriptdata/installers b/scriptdata/installers.sh
similarity index 98%
rename from scriptdata/installers
rename to scriptdata/installers.sh
index 4cf45f3a9..52b74173a 100644
--- a/scriptdata/installers
+++ b/scriptdata/installers.sh
@@ -1,9 +1,9 @@
-# This file is provided for any distros, mainly non-Arch(based) distros.
-
-# This script depends on `functions' .
+# This script depends on `functions.sh' .
 # This is NOT a script for execution, but for loading functions, so NOT need execution permission or shebang.
 # NOTE that you NOT need to `cd ..' because the `$0' is NOT this file, but the script file which will source this file.
 
+# This file is provided for any distros, mainly non-Arch(based) distros.
+
 # The script that use this file should have two lines on its top as follows:
 # cd "$(dirname "$0")"
 # export base="$(pwd)"
diff --git a/scriptdata/options b/scriptdata/options.sh
similarity index 100%
rename from scriptdata/options
rename to scriptdata/options.sh
diff --git a/uninstall.sh b/uninstall.sh
index b48cc79db..c72bf5f17 100755
--- a/uninstall.sh
+++ b/uninstall.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 cd "$(dirname "$0")"
-source ./scriptdata/environment-variables
-source ./scriptdata/functions
+source ./scriptdata/environment-variables.sh
+source ./scriptdata/functions.sh
 prevent_sudo_or_root
 
 function v() {