diff --git a/circle.yml b/circle.yml
index 1a9b7f8a..2b4dbe8d 100644
--- a/circle.yml
+++ b/circle.yml
@@ -1,6 +1,12 @@
 machine:
   post:
-    - pyenv global 2.7.13 3.6.2
+    - pyenv global 2.7.12 3.6.2
+dependencies:
+  pre:
+    - pip install --upgrade pip
+    - pip3 install --upgrade pip
+    - pip install hacking
+    - pip3 install hacking
 general:
   branches:
     ignore: