diff --git a/manifests/api.pp b/manifests/api.pp
index 2d75068..b20ddaa 100644
--- a/manifests/api.pp
+++ b/manifests/api.pp
@@ -63,6 +63,10 @@ class openstack_health::api(
     ensure => present,
   }
 
+  package {'zlib1g-dev':
+    ensure => present,
+  }
+
   exec { 'requirements':
     command     => "${virtualenv_dir}/bin/pip install -U -r ${source_dir}/requirements.txt",
     require     => Python::Virtualenv[$virtualenv_dir],