diff --git a/README.md b/README.md
index c9d61ae..1510938 100644
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@ missing development libraries for libxslt, libxml2 and libvirt.
 
 In Ubuntu, Debian, ...
 ```
-$ sudo apt-get install libxslt-dev libxml2-dev libvirt-dev
+$ sudo apt-get install libxslt-dev libxml2-dev libvirt-dev zlib1g-dev
 ```
 
 In RedHat, Centos, Fedora, ...