diff --git a/appveyor.yml b/appveyor.yml
index 19653ef..ccb7b5e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -29,6 +29,7 @@ init:
   - ps: "ls C:/Python*"
 
 install:
+  - "%PYTHON%/python.exe -m pip install --upgrade wheel pip setuptools virtualenv"
   - "%PYTHON%/python.exe -m pip install tox"
   - "%PYTHON%/python.exe -m pip install -e ."