diff --git a/appveyor.yml b/appveyor.yml
index 781dc6cbba6ddebedc342df4f6b14475ec7c3509..d634de0a519f972df67cb014dc06197706456a3e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -19,7 +19,7 @@ install:
   - refreshenv
 
   # Install Python modules
-  - "%PYTHON%\\python -m pip install ecdsa pycrypto coverage"
+  - "%PYTHON%\\python -m pip install ecdsa cryptography coverage"
 
 test_script:
   # Set environment variables