diff --git a/appveyor.yml b/appveyor.yml
index e9fec6a49..47cdb32b4 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,7 +1,7 @@
 version: 1.0.{build}
 install:
 - ps: |
-    C:\Python27-x64\Scripts\pip.exe install --upgrade pip
+    C:\Python27-x64\python.exe -m pip install --upgrade pip
     C:\Python27-x64\Scripts\pip.exe install --egg scons
     C:\Python27-x64\Scripts\pip.exe install numpy
     C:\Python27-x64\Scripts\pip.exe install cython