diff --git a/appveyor.yml b/appveyor.yml
index f5faee5c..085186c3 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -22,6 +22,7 @@ environment:
 
 install:
  - "set PATH=%MINICONDA%;%MINICONDA%\\Scripts;%PATH%"
+ - conda clean --packages
  - conda config --set always_yes yes --set changeps1 no
  - conda update -q conda
  - conda info -a