diff --git a/appveyor-test.yml b/appveyor-test.yml
index b38347d6..3d6a2c54 100644
--- a/appveyor-test.yml
+++ b/appveyor-test.yml
@@ -23,5 +23,6 @@ test_script:
  - .\packages\OpenCover.4.7.1221\tools\OpenCover.Console.exe -register -target:"vstest.console.exe" -targetargs:"/logger:Appveyor .\SafeExamBrowser.Service.UnitTests\bin\%PLATFORM%\%CONFIGURATION%\SafeExamBrowser.Service.UnitTests.dll" -filter:"+[*]* -[*.UnitTests]* -[*Moq*]*" -mergebyhash -mergeoutput -output:"coverage.xml"
 after_test:
  - "SET PATH=C:\\Python34;C:\\Python34\\Scripts;%PATH%"
+ - pip install --upgrade pip
  - pip install codecov
  - codecov -f "coverage.xml" -X gcov