diff --git a/pages/common/scheme.md b/pages/common/scheme.md
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--- a/pages/common/scheme.md
+++ b/pages/common/scheme.md
@@ -1,6 +1,7 @@
 # scheme
 
 > MIT Scheme language interperter and REPL (interactive shell).
+> Homepage: <https://www.gnu.org/software/mit-scheme>.
 
 - Open an interactive shell (REPL):