diff --git a/README.md b/README.md
index 434aad0..df9b5ba 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ If you want to build your own Windows binaries:
 3. Follow the steps listed under [From source](#from-source)
 4. cd path\to\svtplay-dl && mkdir build
 5. `python setversion.py`  # this will change the version string to a more useful one
-5. `python %PYTHON%\\Scripts\\cxfreeze --include-modules=queue,idna.idnadata --target-dir=build bin/svtplay-dl`
+5. `python %PYTHON%\\Scripts\\cxfreeze --include-modules=cffi,queue,idna.idnadata --target-dir=build bin/svtplay-dl`
 6. Find binary in build folder. you need `svtplay-dl.exe` and `pythonXX.dll` from that folder to run `svtplay-dl.exe`
 
 ### Other systems with python
diff --git a/appveyor.yml b/appveyor.yml
index 16b672c..8edb802 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -32,7 +32,7 @@ test_script:
 after_test:
   - "mkdir svtplay-dl"
   - "python setversion.py"
-  - "python %PYTHON%\\Scripts\\cxfreeze --include-modules=queue,idna.idnadata --target-dir=svtplay-dl bin/svtplay-dl"
+  - "python %PYTHON%\\Scripts\\cxfreeze --include-modules=cffi,queue,idna.idnadata --target-dir=svtplay-dl bin/svtplay-dl"
   - "svtplay-dl\\svtplay-dl.exe --version"
   - "7z.exe a -tzip svtplay-dl.zip svtplay-dl"
   - IF "%APPVEYOR_PULL_REQUEST_NUMBER%"=="" python scripts/cibuild.py