diff --git a/pyproject.toml b/pyproject.toml
index c84af8b..c607dbd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,7 +19,7 @@ dev = [
 ]
 train = [
   "torch>=2.2.2",
-  "tiktoken>=0.5.1",
+  "tiktoken>=0.12.0",
   "matplotlib>=3.7.1",
   "numpy>=1.26",
   "pandas>=2.2.1",