diff --git a/barbican/common/config.py b/barbican/common/config.py
index 7abd83f15..a372f35fd 100644
--- a/barbican/common/config.py
+++ b/barbican/common/config.py
@@ -29,8 +29,8 @@ from oslo_service import _options
 from barbican import i18n as u
 import barbican.version
 
-MAX_BYTES_REQUEST_INPUT_ACCEPTED = 15000
-DEFAULT_MAX_SECRET_BYTES = 10000
+MAX_BYTES_REQUEST_INPUT_ACCEPTED = 25000
+DEFAULT_MAX_SECRET_BYTES = 20000
 KS_NOTIFICATIONS_GRP_NAME = 'keystone_notifications'
 
 context_opts = [
diff --git a/barbican/tests/api/controllers/test_secrets.py b/barbican/tests/api/controllers/test_secrets.py
index 34622216c..1329619ed 100644
--- a/barbican/tests/api/controllers/test_secrets.py
+++ b/barbican/tests/api/controllers/test_secrets.py
@@ -628,7 +628,7 @@ class WhenGettingPuttingOrDeletingSecret(utils.BarbicanAPIBaseTestCase):
 
         self.assertEqual(201, resp.status_int)
 
-        text_too_big = 'x' * 10050
+        text_too_big = 'x' * 20050
         put_resp = self.app.put(
             '/secrets/{0}'.format(secret_uuid),
             text_too_big,
diff --git a/functionaltests/api/base.py b/functionaltests/api/base.py
index 42cb1bdf8..f195f27dd 100644
--- a/functionaltests/api/base.py
+++ b/functionaltests/api/base.py
@@ -36,7 +36,7 @@ conf_multiple_backends_enabled = CONF.keymanager.\
 
 
 class TestCase(oslotest.BaseTestCase):
-    max_payload_size = 10000
+    max_payload_size = 20000
     max_sized_payload = b'a' * max_payload_size
     oversized_payload = b'a' * (max_payload_size + 1)
     max_field_size = 255
diff --git a/releasenotes/notes/increase-max-secret-size-da90164d8b328727.yaml b/releasenotes/notes/increase-max-secret-size-da90164d8b328727.yaml
new file mode 100644
index 000000000..4cb08f8ab
--- /dev/null
+++ b/releasenotes/notes/increase-max-secret-size-da90164d8b328727.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    The default maximum secret size has been increased from 10 kB to 20 kb, and
+    the default maximum request size has been increased from 15 kB to 25 kB.