diff --git a/packages/title-case/src/index.ts b/packages/title-case/src/index.ts
index d9dfdd09..4a5347c8 100644
--- a/packages/title-case/src/index.ts
+++ b/packages/title-case/src/index.ts
@@ -1,9 +1,8 @@
 const TOKENS = /(\S+)|(.)/g;
-const IS_SPECIAL_CASE = /[\.#]\p{Alphabetic}/u; // #tag, example.com, etc.
+const IS_SPECIAL_CASE = /[\.#][\p{L}\p{N}]/u; // #tag, example.com, etc.
 const IS_MANUAL_CASE = /\p{Ll}(?=[\p{Lu}])/u; // iPhone, iOS, etc.
-const ALPHANUMERIC_PATTERN = /[\p{Alphabetic}\p{Nd}]+/gu;
-const IS_ACRONYM =
-  /^(\P{Alphabetic})*(?:\p{Alphabetic}\.){2,}(\P{Alphabetic})*$/u;
+const ALPHANUMERIC_PATTERN = /[\p{L}\p{N}]+/gu;
+const IS_ACRONYM = /^([^\p{L}])*(?:\p{L}\.){2,}([^\p{L}])*$/u;
 
 export const WORD_SEPARATORS = new Set(["—", "–", "-", "―", "/"]);