diff --git a/setup.py b/setup.py
index 79ea0c3..ca07465 100644
--- a/setup.py
+++ b/setup.py
@@ -65,7 +65,7 @@
     ],
     python_requires='>=3.12.1',
     install_requires=[
-        'keri>=1.1.6',
+        'keri>=1.2.0-dev0',
         'multicommand>=1.0.0',
         'requests>=2.28',
         'http_sfv>=0.9.8',
diff --git a/src/signify/app/credentialing.py b/src/signify/app/credentialing.py
index e5a5948..e45e444 100644
--- a/src/signify/app/credentialing.py
+++ b/src/signify/app/credentialing.py
@@ -95,7 +95,7 @@ def serialize(serder, anc):
         if len(atc) % 4:
             raise ValueError("Invalid attachments size={}, nonintegral"
                              " quadlets.".format(len(atc)))
-        pcnt = coring.Counter(code=coring.CtrDex.AttachedMaterialQuadlets,
+        pcnt = coring.Counter(code=coring.CtrDex.AttachmentGroup,
                               count=(len(atc) // 4)).qb64b
         msg = bytearray(serder.raw)
         msg.extend(pcnt)
diff --git a/tests/core/test_authing.py b/tests/core/test_authing.py
index b6b5574..f66efda 100644
--- a/tests/core/test_authing.py
+++ b/tests/core/test_authing.py
@@ -9,6 +9,7 @@
 from keri import kering
 from keri.core import serdering
 from keri.core.coring import Tiers
+from keri.kering import Serials, versify
 from mockito import mock, unstub, expect, verifyNoUnwantedInteractions
 import pytest
 
@@ -131,7 +132,7 @@ def test_controller_derive():
     assert serder.raw == raw
 
     from keri.core import coring
-    e1 = dict(v=coring.Vstrings.json,
+    e1 = dict(v=versify(kind=Serials.json, size=0),
               t="rot",
               d="",
               i="EMPYj-h2OoCyPGQoUUd1tLUYe62YD_8A3jjXxqYawLcV",
diff --git a/tests/core/test_keeping.py b/tests/core/test_keeping.py
index fdc2dfd..cab7acb 100644
--- a/tests/core/test_keeping.py
+++ b/tests/core/test_keeping.py
@@ -845,7 +845,7 @@ def test_base_keeper_sign_indexed(indexed, indices, ondices):
     from keri.core.coring import Signer
     mock_signer_one = mock(spec=Signer, strict=True)
 
-    from keri.core.coring import Siger
+    from keri.core import Siger
     mock_cigar = mock({'qb64': 'an indexed signature'}, spec=Siger, strict=True)
     expect(mock_signer_one, times=1).sign(b'ser bytes', index=0, only=False, ondex=0).thenReturn(mock_cigar)