diff --git a/appveyor.yml b/appveyor.yml
index 791b426..634a711 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,6 +14,7 @@ platform:
     -x64
 
 install:
+  - cinst ffmpeg
   - "%PYTHON%\\python.exe -m pip install pytest pytest-cov coveralls"
   - "%PYTHON%\\python.exe -m pip install ."