diff --git a/R/defaults/main.yml b/R/defaults/main.yml
index b03a4c40..e27b8f28 100644
--- a/R/defaults/main.yml
+++ b/R/defaults/main.yml
@@ -14,7 +14,7 @@
 r_install_cran_repo: absent
 #r_cran_mirror_site: http://cran.rstudio.com
 r_cran_set_default_mirror: True
-r_cran_mirror_site: http://cran.mirror.garr.it/mirrors/CRAN/
+r_cran_mirror_site: https://cran.mirror.garr.it/mirrors/CRAN/
 r_base_specific_version: False
 r_base_pkg_version: 2.14.1
 r_packages_main_state: present