diff --git a/.appveyor.yml b/.appveyor.yml
index f2d166754..a379cdd31 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -23,6 +23,7 @@ install:
   # We need wheel installed to build wheels
   - "%PYTHON%\\python.exe -m pip install wheel"
   - "%PYTHON%\\python.exe -m pip install cython"
+  - "%PYTHON%\\python.exe -m pip install -r requirements.txt"
   - "%PYTHON%\\python.exe -m pip install -e ."
 
 build: off