diff --git a/unifiedbooster/gbdt.py b/unifiedbooster/gbdt.py
index f958dc0..36f2d43 100644
--- a/unifiedbooster/gbdt.py
+++ b/unifiedbooster/gbdt.py
@@ -24,6 +24,9 @@ class GBDT(BaseEstimator):
 
         seed: int
             reproducibility seed
+
+        **kwargs: dict
+            additional parameters to be passed to the class
     """
 
     def __init__(
diff --git a/unifiedbooster/gbdt_classification.py b/unifiedbooster/gbdt_classification.py
index f4c693d..6ff158f 100644
--- a/unifiedbooster/gbdt_classification.py
+++ b/unifiedbooster/gbdt_classification.py
@@ -32,6 +32,9 @@ class GBDTClassifier(GBDT, ClassifierMixin):
         seed: int
             reproducibility seed
 
+        **kwargs: dict
+            additional parameters to be passed to the class
+
     Examples:
 
     ```python
diff --git a/unifiedbooster/gbdt_regression.py b/unifiedbooster/gbdt_regression.py
index 18e19f7..9250f52 100644
--- a/unifiedbooster/gbdt_regression.py
+++ b/unifiedbooster/gbdt_regression.py
@@ -32,6 +32,9 @@ class GBDTRegressor(GBDT, RegressorMixin):
         seed: int
             reproducibility seed
 
+        **kwargs: dict
+            additional parameters to be passed to the class
+
     Examples:
 
     ```python