diff --git a/seafile-server-ce-ubuntu-14-04-amd64-http b/seafile-server-ce-ubuntu-14-04-amd64-http
index 56fe9d2..b269b53 100644
--- a/seafile-server-ce-ubuntu-14-04-amd64-http
+++ b/seafile-server-ce-ubuntu-14-04-amd64-http
@@ -95,6 +95,7 @@ fi
 # Ensure aptitude is installed
 # -------------------------------------------
 apt-get install aptitude -y
+aptitude update
 
 # -------------------------------------------
 # Additional requirements