diff --git a/appveyor.yml b/appveyor.yml
index ea8ca42eb..c3c6562f1 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -22,8 +22,8 @@ environment:
 
 # scripts that run after cloning repository
 install:
-  - ps: (new-object net.webclient).DownloadFile('https://bootstrap.pypa.io/get-pip.py', 'C:/get-pip.py')
-  - "C:/Python27/python.exe C:/get-pip.py"
+  - powershell -Command "& {(new-object net.webclient).DownloadFile('https://bootstrap.pypa.io/get-pip.py', 'C:/get-pip.py')}"
+  - powershell -Command "& {C:/Python27/python.exe C:/get-pip.py}"
   - "C:/Python27/Scripts/pip.exe install pyjavaproperties"
   - "C:/Python27/Scripts/pip.exe install github3.py"