diff --git a/.drone.yml b/.drone.yml
index 649d702..9a6ed08 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -9,4 +9,4 @@ steps:
   commands:
   - export TAR="/bin/tar"
   - Rscript -e 'devtools::install_github("jimhester/lintr")'
-  - Rscript -e 'lintr::lint_dir()'
+  - Rscript -e 'lint_dir(path=".", pattern=rex::rex(".", one_of("Rr"), maybe("md"), end))'