diff --git a/src/input/input_python.rs b/src/input/input_python.rs
index cd8ecf267..fe688a487 100644
--- a/src/input/input_python.rs
+++ b/src/input/input_python.rs
@@ -246,10 +246,11 @@ impl<'a> Input<'a> for PyAny {
                 Err(_) => return Err(ValError::new(ErrorTypeDefaults::StringUnicode, self)),
             };
             Ok(s.into())
-        } else if coerce_numbers_to_str && {
+        } else if coerce_numbers_to_str && !PyBool::is_exact_type_of(self) && {
             let py = self.py();
             let decimal_type: Py<PyType> = get_decimal_type(py);
 
+            // only allow int, float, and decimal (not bool)
             self.is_instance_of::<PyInt>()
                 || self.is_instance_of::<PyFloat>()
                 || self.is_instance(decimal_type.as_ref(py)).unwrap_or_default()
diff --git a/tests/validators/test_string.py b/tests/validators/test_string.py
index acb145a58..cab6e5127 100644
--- a/tests/validators/test_string.py
+++ b/tests/validators/test_string.py
@@ -277,6 +277,16 @@ def test_coerce_numbers_to_str_disabled_in_strict_mode() -> None:
         v.validate_json('42')
 
 
+def test_coerce_numbers_to_str_raises_for_bool() -> None:
+    config = core_schema.CoreConfig(coerce_numbers_to_str=True)
+
+    v = SchemaValidator(core_schema.str_schema(), config)
+    with pytest.raises(ValidationError):
+        v.validate_python(True)
+    with pytest.raises(ValidationError):
+        v.validate_json(False)
+
+
 @pytest.mark.parametrize(
     ('number', 'expected_str'),
     [