diff --git a/circle.yml b/circle.yml
index 0ec71d6..3a00835 100644
--- a/circle.yml
+++ b/circle.yml
@@ -3,6 +3,7 @@ machine:
 
 dependencies:
   post:
+    - sudo apt-get update
     - >
       sudo apt-get install -y
       libgtk-3-0