diff --git a/appveyor.yml b/appveyor.yml
index c39826c0..f45bdd78 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,8 +7,10 @@ environment:
       
   matrix:
     - CONDA_PY: 37
-    - CONDA_PY: 38 CONDA_NPY: 116
-    - CONDA_PY: 39 CONDA_NPY: 119
+    - CONDA_PY: 38 
+      CONDA_NPY: 116
+    - CONDA_PY: 39 
+      CONDA_NPY: 119
 
 install:
   - git clone https://github.com/OpenAlea/appveyor-ci.git appveyor-ci