diff --git a/causalpy/experiments/regression_discontinuity.py b/causalpy/experiments/regression_discontinuity.py
index 1afc5c1a..ebf3b103 100644
--- a/causalpy/experiments/regression_discontinuity.py
+++ b/causalpy/experiments/regression_discontinuity.py
@@ -190,6 +190,8 @@ def input_validation(self):
             raise DataException(
                 """The treated variable should be dummy coded. Consisting of 0's and 1's only."""  # noqa: E501
             )
+        if not self.data['treated'].dtype == 'bool':
+            raise ValueError("The 'treated' column must be of type bool.Please convert your data accordingly.")
 
     def _is_treated(self, x):
         """Returns ``True`` if `x` is greater than or equal to the treatment threshold.
diff --git a/causalpy/experiments/test_treated_column_valid.py b/causalpy/experiments/test_treated_column_valid.py
new file mode 100644
index 00000000..99397e1e
--- /dev/null
+++ b/causalpy/experiments/test_treated_column_valid.py
@@ -0,0 +1,20 @@
+import pandas as pd
+import pytest
+
+def _check_treated_column_validity(df, treated_col_name):
+    treated_col = df[treated_col_name]
+    if not pd.api.types.is_bool_dtype(treated_col):
+        raise ValueError(f"The '{treated_col_name}' column must be of boolean dtype (True/False).")
+
+def test_treated_column_with_integers():
+    df = pd.DataFrame({"treated": [0, 1, 0, 1]})
+    with pytest.raises(ValueError, match="treated.*must be of boolean dtype"):
+        _check_treated_column_validity(df, "treated")
+
+def test_treated_column_with_booleans():
+    df = pd.DataFrame({"treated": [True, False, True, False]})
+    try:
+        _check_treated_column_validity(df, "treated")
+    except ValueError:
+        pytest.fail("Unexpected ValueError raised")
+