diff --git a/pyproject.toml b/pyproject.toml
index 98b708c29..fa6752ac5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -34,7 +34,7 @@ dependencies = [
 "sentencepiece>=0.1.99,<0.3",
 "tokenizers>=0.13.3,<1.0",
 "tqdm>=4.66.2,<5.0",
-"trl>=0.13,<0.20",
+"trl>=0.13,<0.22",
 "peft>=0.15.0,<=0.15.2",
 "protobuf>=5.28.0,<6.0.0",
 "datasets>=3.5.0,<4.0",