diff --git a/circle.yml b/circle.yml
index 78835c37cec8d0cc24c4e55be5a309744b1ec580..ed4d76dae6d9e869d9797c3d907c2773b2dc4cbb 100644
--- a/circle.yml
+++ b/circle.yml
@@ -8,7 +8,7 @@ machine:
 
 dependencies:
   pre:
-    - sudo curl -L -o /usr/bin/docker 'http://s3-external-1.amazonaws.com/circle-downloads/docker-1.6.0-circleci'; chmod 0755 /usr/bin/docker; true
+    - sudo curl -L -o /usr/bin/docker http://s3-external-1.amazonaws.com/circle-downloads/docker-$DOCKER_VERSION-circleci; chmod 0755 /usr/bin/docker; true
     - sudo service docker start
     - "sudo apt-get update && sudo apt-get install -y libgmp3-dev"