diff --git a/toc.sh b/toc.sh
index acd0d5a913fa0..5256b3b8ed061 100755
--- a/toc.sh
+++ b/toc.sh
@@ -36,10 +36,11 @@ toc="$(
 				prefix = "\t" prefix
 			}
 
+			# https://github.com/thlorenz/anchor-markdown-header/blob/56f77a232ab1915106ad1746b99333bf83ee32a2/anchor-markdown-header.js#L20-L30
 			hash = tolower($0)
-			gsub(/['"'"'./`]/, "", hash)
-			gsub(/[^a-z0-9]+/, "-", hash)
-			gsub(/^-|-$/, "", hash)
+			gsub(/ /, "-", hash)
+			gsub(/[\/?!:\[\]`.,()*"'"'"';{}+=<>~\$|#@&–—]/, "", hash)
+			gsub(/[。？！，、；：“”【】（）〔〕［］﹃﹄“ ”‘’﹁﹂—…－～《》〈〉「」]/, "", hash)
 
 			printf "%s[%s](#%s)\n", prefix, $0, hash
 		}