diff --git a/appveyor.yml b/appveyor.yml
index e856af3..0a8ce5c 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -17,3 +17,5 @@ build: off
 test_script:
   - "python -m pip install tox"
   - "tox"
+
+version: '{build}'