diff --git a/circle.yml b/circle.yml
index a5170afd2b..f75a706df5 100644
--- a/circle.yml
+++ b/circle.yml
@@ -23,7 +23,7 @@ dependencies:
 
     # Install pip if you don't already have it and use it to install the required packages:
     - sudo easy_install pip
-    - sudo -H pip install pyserial empy pandas jinja2
+    - sudo -H pip install pyserial empy toml pandas jinja2
 
 test:
   override: