diff --git a/README.md b/README.md
index b5849d517..c64fd9b20 100644
--- a/README.md
+++ b/README.md
@@ -9,8 +9,8 @@
 ## Contents
 
 * [Even or odd number](#even-or-odd-number)
-* [Greatest common divisor gcd](#greatest-common-divisor-gcd)
-* [RGB to hexadecimal](#RGB-to-hexadecimal)
+* [Greatest common divisor (GCD)](#greatest-common-divisor-gcd)
+* [RGB to hexadecimal](#rgb-to-hexadecimal)
 * [Sort characters in string alphabetical](#sort-characters-in-string-alphabetical)
 * [Sum of array of numbers](#sum-of-array-of-numbers)
 * [Unique values of array](#unique-values-of-array)
diff --git a/scripts/builder.js b/scripts/builder.js
index dfa15db0a..1b6ab5b67 100644
--- a/scripts/builder.js
+++ b/scripts/builder.js
@@ -28,7 +28,7 @@ catch (err){
 try {
   output += `${startPart+'\n'}`;
   for(var snippet of Object.entries(snippets))
-    output += `* [${snippet[0][0].toUpperCase() + snippet[0].replace(/-/g,' ').slice(1,snippet[0].length-3)}](#${snippet[0].slice(0,snippet[0].length-3)})\n`
+    output += `* [${snippet[0][0].toUpperCase() + snippet[0].replace(/-/g,' ').slice(1,snippet[0].length-3)}](#${snippet[0].slice(0,snippet[0].length-3).replace(/\(/g,'').replace(/\)/g,'').toLowerCase()})\n`
   output += '\n';
   for(var snippet of Object.entries(snippets))
     output += `${snippet[1]+'\n'}`;
diff --git a/snippets/greatest-common-divisor-gcd.md b/snippets/greatest-common-divisor-(GCD).md
similarity index 100%
rename from snippets/greatest-common-divisor-gcd.md
rename to snippets/greatest-common-divisor-(GCD).md