diff --git a/circle.yml b/circle.yml
index a940c17..7e56091 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,7 +1,6 @@
 dependencies:
   pre:
-    - sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF echo "deb http://download.mono-project.com/repo/debian wheezy main" | sudo tee /etc/apt/sources.list.d/mono-xamarin.list
-    - sudo apt-get update; sudo apt-get install  mono-devel mono-complete referenceassemblies-pcl  ca-certificates-mono
+    - sudo apt-get update; sudo apt-get install  mono-devel mono-complete
 test:
   override:
     - rake preflight