diff --git a/requirements.txt b/requirements.txt
index 0d638a5..d81423b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,6 +24,7 @@ djangocms-snippet==1.0.2
 djangocms-teaser==0.0.1
 djangocms-text-ckeditor==2.1.6
 djangocms-video==0.0.1
+ghostscript==0.4.1
 flup
 html5lib==0.999
 ipython==2.1.0