diff --git a/README.md b/README.md
index 8a6a9d0..1fbfd50 100644
--- a/README.md
+++ b/README.md
@@ -23,19 +23,19 @@ installed: /etc/systemd/system/xray@.service
 **Install & Upgrade Xray-core and geodata with User nobody, but will NOT overwrite User in existing service files**
 
 ```
-# bash <(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh) install
+# bash -c "$(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh)" @ install
 ```
 
 **Update geoip.dat and geosite.dat only**
 
 ```
-# bash <(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh) install-geodata
+# bash -c "$(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh)" @ install-geodata
 ```
 
 **Remove Xray, except json and logs**
 
 ```
-# bash <(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh) remove
+# bash -c "$(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh)" @ remove
 ```
 
 ## Advance
@@ -43,23 +43,23 @@ installed: /etc/systemd/system/xray@.service
 **Install & Upgrade Xray-core and geodata with User root, which will overwrite User in existing service files**
 
 ```
-# bash <(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh) install -u root
+# bash -c "$(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh)" @ install -u root
 ```
 
 **Install & Upgrade Xray-core without geodata**
 
 ```
-# bash <(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh) install --without-geodata
+# bash -c "$(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh)" @ install --without-geodata
 ```
 
 **Remove Xray, include json and logs**
 
 ```
-# bash <(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh) remove --purge
+# bash -c "$(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh)" @ remove --purge
 ```
 
 ## More Usage
 
 ```
-# bash <(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh) help
+# bash -c "$(curl -L https://github.com/XTLS/Xray-install/raw/main/install-release.sh)" @ help
 ```