diff --git a/appveyor.yml b/appveyor.yml
index 56cc65c..9ea12c9 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -9,7 +9,7 @@ environment:
 
 install:
   - pip install pipenv
-  - pipenv --python 3
+  - pipenv --python 3.7
   - pipenv install --dev
 
 build: off