diff --git a/appveyor.yml b/appveyor.yml
index 4c1ed996..6cfc4968 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,7 +7,7 @@ install:
 build_script:
   - cd "%APPVEYOR_BUILD_FOLDER%"
   - ocaml bootstrap.ml
-  - boot.exe
+  - boot.exe --dev
 
 artifacts:
   - path: _build/log