Change shell to bash at last

README.md

@@ -14,4 +14,4 @@ Supported languages: Chinese (simplified), English, French, German, Portuguese,
     - Run it: `bash /tmp/install.sh`
 
 2. **Easier, less secure way** — just download and run install script:  
-    `wget -O - https://github.com/shvchk/poly-light/raw/master/install.sh | sh`
+    `wget -O - https://github.com/shvchk/poly-light/raw/master/install.sh | bash`