diff --git a/Gemfile b/Gemfile
index 685fa9ba..19f016c3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,7 +15,7 @@ gem 'faye-websocket'
 gem 'forgery'
 gem 'highline'
 gem 'i18n-js'
-gem 'ims-lti', '< 2.0.0'
+gem 'ims-lti', '< 2.0.0' # Version 2 implements LTI 2.0, which is deprecated. Hence, we stay with version 1.
 gem 'jbuilder'
 gem 'json_schemer'
 gem 'js-routes'