diff --git a/README.md b/README.md
index 46e2f34..96f13d9 100644
--- a/README.md
+++ b/README.md
@@ -72,7 +72,7 @@
 - [§48: ATLANTIS](#48-atlantis)
 - [§49: OLE + SON, AMUN + RA](#49-ole-son-amun-ra)
 - [§50: ROH ON C (The Rohonc Codex)](#50-roh-on-c-the-rohonc-codex)
-- [§51: SUMERIAN → Σ](#51-sumerian--σ)
+- [§51: SUMERIAN → Σ](#51-sumerian)
 - [§52: Σ + 1 = $](#52-σ--1--)
 - [§53: The Julia Set](#53-the-julia-set)
 - [§54: The Observer Is the System](#54-the-observer-is-the-system)