diff --git a/pyproject.toml b/pyproject.toml
index 0fad6a0..03b22e1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ pgmpy = "0.1.20"
 thegolem = ">=0.3.1"
 xgboost = ">=1.7.6"
 catboost = ">=1.0.6"
-lightgbm = {version = ">=4.0.0", optional = true }
+lightgbm = {version = ">=3.3.5", optional = true }
 
 [tool.poetry.extras]
 composite_extras = ["lightgbm"]