diff --git a/pyproject.toml b/pyproject.toml
index 9fd943ea2c..b6e6f568b0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ aiofiles = "^24.1.0"
 
 # LLM
 openai = "^1.57.0"
-nltk = "3.9.1"
+nltk = ">=3.9.3,<4.0.0"
 tiktoken = "^0.8.0"
 
 # Data-Sci