diff --git a/appveyor.yml b/appveyor.yml
index a540be50cb7f44a987960312ee886a6cc5cf2426..ee251b1749001bc9e35416c499057387baa6e8f2 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -16,7 +16,7 @@ environment:
     matrix:
     - R_VERSION: devel
     - R_VERSION: release
-    - R_VERSION: 3.4.0
+    USE_RTOOLS: true
 
 build_script:
   - travis-tool.sh install_bioc_deps