diff --git a/appveyor.yml b/appveyor.yml
index 26f9543..9d704c7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,6 +1,6 @@
 environment:
   global:
-    TWINE_USERNAME=lejafar
+    TWINE_USERNAME: lejafar
 
 build_script:
   - bash travis/build-openctm-win.sh