diff --git a/sphinx_parser/toolkit.py b/sphinx_parser/toolkit.py
index 9c057f2..8706313 100644
--- a/sphinx_parser/toolkit.py
+++ b/sphinx_parser/toolkit.py
@@ -61,7 +61,7 @@ def fill_values(wrap_string: bool = True, **kwargs) -> dict:
     for k, v in kwargs.items():
         while k.endswith("_"):
             k = k[:-1]
-        if v is not None and v is not False:
+        if v is not None:
             if isinstance(v, list) and len(v) > 0 and isinstance(v[0], dict):
                 for i, vv in enumerate(v):
                     group = append_item(group, k, vv)
diff --git a/tests/unit/test_input.py b/tests/unit/test_input.py
index a31b683..b7d4935 100644
--- a/tests/unit/test_input.py
+++ b/tests/unit/test_input.py
@@ -3,7 +3,7 @@
 from pint import UnitRegistry
 
 from sphinx_parser.input import sphinx
-from sphinx_parser.toolkit import to_sphinx
+from sphinx_parser.toolkit import fill_values, to_sphinx
 
 
 class TestInput(unittest.TestCase):
@@ -49,6 +49,12 @@ def test_units(self):
             {"dEnergy": 3.6749322175664394e-09, "maxSteps": 10, "blockCCG": {}},
         )
 
+    def test_boolean(self):
+        self.assertEqual(
+            to_sphinx(fill_values(hello=True, world=[{"a": True}, {"a": False}])),
+            "hello = true;\nworld {\n\ta = true;\n}\nworld {\n\ta = false;\n}\n",
+        )
+
 
 if __name__ == "__main__":
     unittest.main()