diff --git a/doc/source/cli/property-keys.rst b/doc/source/cli/property-keys.rst
index 9e59124e..5c3cee45 100644
--- a/doc/source/cli/property-keys.rst
+++ b/doc/source/cli/property-keys.rst
@@ -27,3 +27,8 @@ in the Glance Administration Guide.
    For more information, refer to `Manage images
    <https://docs.openstack.org/glance/latest/admin/manage-images.html>`_
    in the Glance Administration Guide.
+
+.. note::
+
+   Boolean properties expect one of the following values: '0', '1', 'f',
+   'false', 'n', 'no', 'off', 'on', 't', 'true', 'y', 'yes' (case-insensitive).
diff --git a/glanceclient/common/utils.py b/glanceclient/common/utils.py
index c3f08de8..0de575f5 100644
--- a/glanceclient/common/utils.py
+++ b/glanceclient/common/utils.py
@@ -103,7 +103,7 @@ def schema_args(schema_getter, omit=None):
     typemap = {
         'string': encodeutils.safe_decode,
         'integer': int,
-        'boolean': strutils.bool_from_string,
+        'boolean': lambda x: strutils.bool_from_string(x, strict=True),
         'array': list
     }
 
diff --git a/glanceclient/tests/unit/test_utils.py b/glanceclient/tests/unit/test_utils.py
index 46cefbf6..d10c70de 100644
--- a/glanceclient/tests/unit/test_utils.py
+++ b/glanceclient/tests/unit/test_utils.py
@@ -229,6 +229,14 @@ class TestUtils(testtools.TestCase):
         self.assertEqual(encodeutils.safe_decode, opts['type'])
         self.assertIn('None, opt-1, opt-2', opts['help'])
 
+        # Make sure we use strict checking for boolean values.
+        decorated = utils.schema_args(schema_getter('boolean'))(dummy_func)
+        arg, opts = decorated.__dict__['arguments'][0]
+        type_function = opts['type']
+        self.assertEqual(type_function('False'), False)
+        self.assertEqual(type_function('True'), True)
+        self.assertRaises(ValueError, type_function, 'foo')
+
     def test_iterable_closes(self):
         # Regression test for bug 1461678.
         def _iterate(i):
diff --git a/releasenotes/notes/boolean-properties-strict-checking-bdd624b5da81e723.yaml b/releasenotes/notes/boolean-properties-strict-checking-bdd624b5da81e723.yaml
new file mode 100644
index 00000000..bd0836d5
--- /dev/null
+++ b/releasenotes/notes/boolean-properties-strict-checking-bdd624b5da81e723.yaml
@@ -0,0 +1,12 @@
+---
+prelude: >
+fixes:
+  - |
+    * Bug 1607317_: metadata def namespace update CLI is not working as expected for parameter "protected"
+
+    .. _1607317: https://code.launchpad.net/bugs/1607317
+other:
+  - |
+    Boolean arguments now expect one of the following values: '0', '1', 'f',
+    'false', 'n', 'no', 'off', 'on', 't', 'true', 'y', 'yes'
+    (case-insensitive). This will not change anything for most users.