diff --git a/appveyor.yml b/appveyor.yml
index 31e40e50b..a0e744d8c 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -6,6 +6,7 @@ install:
     C:\Python27-x64\Scripts\pip.exe install numpy
     C:\Python27-x64\Scripts\pip.exe install cython
     C:\Python27-x64\Scripts\pip.exe install 3to2
+    C:\Python27-x64\Scripts\pip.exe install pypiwin32
 
 build_script:
 - cmd: C:\Python27-x64\scons build -j2 boost_inc_dir=C:\Libraries\boost_1_62_0 debug=n VERBOSE=y