diff --git a/common/header.html b/common/header.html
index 38e85ec..588b0f6 100644
--- a/common/header.html
+++ b/common/header.html
@@ -24,7 +24,7 @@
       .trim()
       .toLowerCase()
       .replace(
-        /[\{\}\[\]\\\/\<\>\(\)\|\+\?\*\^\'\`\'\"\.\_\d\s~!@#$%&,;:=]/gi,
+        /[\{\}\[\]\\\/\<\>\(\)\|\+\?\*\^\'\`\'\"\.\_\$\d\s~!@#%&,;:=]/gi,
         "-"
       )
       .replace(/\-\-+/g, "-")