diff --git a/sparrow-py/pysrc/sparrow_py/session.py b/sparrow-py/pysrc/sparrow_py/session.py
index 60722b6b1..ea6e2d41e 100644
--- a/sparrow-py/pysrc/sparrow_py/session.py
+++ b/sparrow-py/pysrc/sparrow_py/session.py
@@ -13,6 +13,7 @@ class Table(Expr):
 
     data: List[pa.Table] = []
 
+    @classmethod
     def validate_table(
         name: str,
         time_column_name: str,