diff --git a/pages/common/gem.md b/pages/common/gem.md
index ddf829b4f..3ec226a31 100644
--- a/pages/common/gem.md
+++ b/pages/common/gem.md
@@ -1,6 +1,7 @@
 # gem
 
 > Interact with the package manager for the Ruby programming language.
+> More information: <https://rubygems.org>.
 
 - Install latest version of a gem: