diff --git a/cran-comments.md b/cran-comments.md
index 946c2a5..6e56cee 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -1,7 +1,7 @@
 ## Test environments
 
-- local OS X install, R 3.6.2
-- ubuntu 16.04 (with GitHub Actions), R 3.6.2
+- local OS X install, R 4.1.0
+- ubuntu 20.04 (with GitHub Actions), R 4.1.0
 - win-builder (devel and release)
 
 ## R CMD check results