diff --git a/pyproject.toml b/pyproject.toml
index d0c8d07b69..bf66f123c6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -66,7 +66,7 @@ optional-dependencies.extra = [
   # litgpt.pretrain:
   "tensorboard>=2.14",
   "torchmetrics>=1.3.1",
-  "transformers>=4.51.3,<4.52",
+  "transformers>=4.51.3,<4.53",
   # litdata, only on non-Windows:
   "uvloop>=0.2; sys_platform!='win32'",
   # litgpt.data.prepare_slimpajama.py: