diff --git a/outlines/fsm/guide.py b/outlines/fsm/guide.py
index 792eba34f..84410fa80 100644
--- a/outlines/fsm/guide.py
+++ b/outlines/fsm/guide.py
@@ -1,3 +1,4 @@
+import functools
 from dataclasses import dataclass
 from typing import TYPE_CHECKING, List, Optional, Protocol, Tuple, Union
 
@@ -106,7 +107,7 @@ def copy(self):
         return self
 
 
-@cache()
+@functools.lru_cache(maxsize=128)
 def create_states_mapping(
     regex_string: str, tokenizer: "Tokenizer"
 ) -> Tuple[dict, set, set]: