[ci skip] README: update ppa packages

diff --git a/README.md b/README.md
index 0f5f7a4f7b3defa660bda1fab3b657aa54c27712..850cac157aabe2cd0abd380ba2034c2670cd9381 100644 (file)
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ brew install ttyd
 
 ## Install on Linux
 
-- Install from ppa (ubuntu 16.04 only):
+- Install from ppa (ubuntu 16.04 and later):
 
     ```bash
     sudo apt-get install -y software-properties-common