diff --git a/README.md b/README.md
index 32b189a..c0cac3e 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@ lxc-iptag is a simple script to add ip tags to LXC containers.
 ## 1. Installation
 
 ```sh
-curl -sL https://github.com/gitsang/lxc-iptag/raw/main/install.sh | sudo bash
+curl -sL https://github.com/gitsang/lxc-iptag/raw/main/install.sh | bash
 ```
 
 This script will:
@@ -20,8 +20,8 @@ This script will:
 ### 1.1 Update
 
 ```sh
-sudo curl -sSL https://raw.githubusercontent.com/gitsang/lxc-iptag/main/lxc-iptag -o /usr/local/bin/lxc-iptag && sudo chmod +x /usr/local/bin/lxc-iptag
-sudo systemctl restart lxc-iptag.service
+curl -sSL https://raw.githubusercontent.com/gitsang/lxc-iptag/main/lxc-iptag -o /usr/local/bin/lxc-iptag && chmod +x /usr/local/bin/lxc-iptag
+systemctl restart lxc-iptag.service
 ```
 
 This script will only update the `lxc-iptag` executable script
diff --git a/install.sh b/install.sh
index 16afcae..0afee18 100644
--- a/install.sh
+++ b/install.sh
@@ -3,7 +3,7 @@
 set -xe
 
 # install prerequisites
-sudo apt install -y ipcalc
+apt install -y ipcalc
 
 # install lxc-iptag
 curl -sSL https://raw.githubusercontent.com/gitsang/lxc-iptag/main/lxc-iptag -o /usr/local/bin/lxc-iptag && chmod +x /usr/local/bin/lxc-iptag
@@ -13,6 +13,6 @@ curl -sSL https://raw.githubusercontent.com/gitsang/lxc-iptag/main/lxc-iptag.con
 curl -sSL https://raw.githubusercontent.com/gitsang/lxc-iptag/main/lxc-iptag.service -o /lib/systemd/system/lxc-iptag.service
 
 # start lxc-iptag
-sudo systemctl daemon-reload
-sudo systemctl enable lxc-iptag.service
-sudo systemctl start lxc-iptag.service
+systemctl daemon-reload
+systemctl enable lxc-iptag.service
+systemctl start lxc-iptag.service