diff --git a/README.md b/README.md
index 0f864c6..60522a0 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
 # tinio
 The Github repository of TinI/O.
 TinI/O is an interface to the CY7C65211 chip. Its main purpose is to expand a computer's I/O.
-Documentation: <tinio.rtfd.io>
+Documentation: <http://tinio.rtfd.io>