diff --git a/Gemfile b/Gemfile
index 1e2d8910c870b02d62d7134ad14af0276cfbcd88..6f11d44c58d13b0c7a3ce818cd3cfe2a3a91205a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -11,6 +11,7 @@ source "https://rubygems.org"
 
 
 gem "jekyll", "< 4.0"
+gem 'sassc', '~> 2.1.0'
 
 # If you have any plugins, put them here!
 group :jekyll_plugins do
diff --git a/README.md b/README.md
index aa0e727dac296d00d05f2447908ed5e8652b9684..ef213589944ebb8e575d223f04784b3f9032defc 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,7 @@ To use this website, the following steps are necessary:
 
 # Basic use:
 
-rvm use ruby 2.6
+rvm use ruby 2.6 # on M1 install with rvm install 2.6.6 --with-gcc=clang
+bundle install # if needed
 bundle exec jekyll build
 bundle exec jekyll serve  &