diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 436163f3..e18821cd 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,11 @@
 Changelog
 =========
 
+Version 14.1
+============
+
+* Require iqm-client >= 17.6. `#132 <https://github.com/iqm-finland/cirq-on-iqm/pull/132>`_
+
 Version 14.0
 ============
 
diff --git a/docs/user_guide.rst b/docs/user_guide.rst
index 63e1d4aa..c2c481b1 100644
--- a/docs/user_guide.rst
+++ b/docs/user_guide.rst
@@ -287,7 +287,7 @@ The below table summarises the currently available options:
        Setting this value to ``0.0`` will disable circuit duration check.
        The default value ``None`` means the server default value will be used.
    * - `heralding_mode`
-     - :py:class:`~iqm_client.iqm_client.HeraldingMode`
+     - :py:class:`~iqm_client.models.HeraldingMode`
      - "zeros"
      - Heralding mode to use during execution. The default value is "none", "zeros" enables heralding.
 
diff --git a/pyproject.toml b/pyproject.toml
index 0731cd38..ffa354e0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ dependencies = [
     "numpy",
     "cirq-core[contrib] ~= 1.2",
     "ply",  # Required by cirq.contrib.qasm_import
-    "iqm-client >= 17.1, < 18.0"
+    "iqm-client >= 17.6, < 18.0"
 ]
 
 [project.urls]
diff --git a/src/iqm/cirq_iqm/iqm_sampler.py b/src/iqm/cirq_iqm/iqm_sampler.py
index 1923f9a1..4e2d75eb 100644
--- a/src/iqm/cirq_iqm/iqm_sampler.py
+++ b/src/iqm/cirq_iqm/iqm_sampler.py
@@ -27,13 +27,12 @@
 import cirq
 import numpy as np
 
-from iqm import iqm_client
 from iqm.cirq_iqm.devices.iqm_device import IQMDevice, IQMDeviceMetadata
 from iqm.cirq_iqm.iqm_operation_mapping import map_operation
-from iqm.iqm_client import HeraldingMode, IQMClient, JobAbortionError, RunRequest
+from iqm.iqm_client import Circuit, HeraldingMode, IQMClient, JobAbortionError, RunRequest
 
 
-def serialize_circuit(circuit: cirq.Circuit) -> iqm_client.Circuit:
+def serialize_circuit(circuit: cirq.Circuit) -> Circuit:
     """Serializes a quantum circuit into the IQM data transfer format.
 
     Args:
@@ -43,7 +42,7 @@ def serialize_circuit(circuit: cirq.Circuit) -> iqm_client.Circuit:
         data transfer object representing the circuit
     """
     instructions = tuple(map(map_operation, circuit.all_operations()))
-    return iqm_client.Circuit(name='Serialized from Cirq', instructions=instructions)
+    return Circuit(name='Serialized from Cirq', instructions=instructions)
 
 
 class IQMSampler(cirq.work.Sampler):
diff --git a/tests/test_iqm_sampler.py b/tests/test_iqm_sampler.py
index e04499e4..8db68577 100644
--- a/tests/test_iqm_sampler.py
+++ b/tests/test_iqm_sampler.py
@@ -22,6 +22,7 @@
 import sympy  # type: ignore
 
 from iqm.cirq_iqm import Adonis
+import iqm.cirq_iqm as module_under_test
 from iqm.cirq_iqm.iqm_sampler import IQMResult, IQMSampler, ResultMetadata
 from iqm.iqm_client import (
     Circuit,
@@ -344,17 +345,18 @@ def test_run_iqm_batch_allows_to_override_polling_timeout(
     np.testing.assert_array_equal(results[1].measurements['some stuff'], np.array([[1]]))
 
 
+@pytest.mark.usefixtures('unstub')
 def test_credentials_are_passed_to_client():
     user_auth_args = {
         'auth_server_url': 'https://fake.auth.server.com',
         'username': 'fake-username',
         'password': 'fake-password',
     }
-    with when(IQMClient)._update_tokens():
-        sampler = IQMSampler('http://url', Adonis(), **user_auth_args)
-    assert sampler._client._credentials.auth_server_url == user_auth_args['auth_server_url']
-    assert sampler._client._credentials.username == user_auth_args['username']
-    assert sampler._client._credentials.password == user_auth_args['password']
+    when(module_under_test.iqm_sampler).IQMClient('http://url', client_signature=ANY, **user_auth_args).thenReturn(
+        mock(IQMClient)
+    )
+    IQMSampler('http://url', Adonis(), **user_auth_args)
+    verify(module_under_test.iqm_sampler, times=1).IQMClient('http://url', client_signature=ANY, **user_auth_args)
 
 
 @pytest.mark.usefixtures('unstub')
@@ -364,15 +366,16 @@ def test_client_signature_is_passed_to_client():
     assert f'cirq-iqm {version("cirq-iqm")}' in sampler._client._signature
 
 
+@pytest.mark.usefixtures('unstub')
 def test_close_client():
     user_auth_args = {
         'auth_server_url': 'https://fake.auth.server.com',
         'username': 'fake-username',
         'password': 'fake-password',
     }
-    with when(IQMClient)._update_tokens():
-        sampler = IQMSampler('http://url', Adonis(), **user_auth_args)
-    try:
-        sampler.close_client()
-    except Exception as exc:  # pylint: disable=broad-except
-        assert False, f'sampler created with credentials raised an exception {exc} on .close_client()'
+    sampler = IQMSampler('http://url', Adonis(), **user_auth_args)
+    mock_client = mock(IQMClient)
+    sampler._client = mock_client
+    when(mock_client).close_auth_session().thenReturn(True)
+    sampler.close_client()
+    verify(mock_client, times=1).close_auth_session()