diff --git a/.github/CHANGELOG.md b/.github/CHANGELOG.md
new file mode 100644
index 0000000..e9d425e
--- /dev/null
+++ b/.github/CHANGELOG.md
@@ -0,0 +1,31 @@
+# Release 0.2.0-dev
+
+### New features since last release
+
+### Breaking changes
+
+### Improvements
+
+### Documentation
+
+### Bug fixes
+
+* Fix bugs introduces into the test suite by the release of Cirq 0.6.0
+  [#13](https://github.com/XanaduAI/pennylane-cirq/pull/13)
+
+### Contributors
+
+This release contains contributions from (in alphabetical order):
+
+Johannes Jakob Meyer
+
+---
+
+# Release 0.1.0
+
+Initial public release.
+
+### Contributors
+This release contains contributions from:
+
+Johannes Jakob Meyer
diff --git a/.travis.yml b/.travis.yml
index 6d88531..c148d18 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,11 +2,11 @@ language: python
 cache: pip
 dist: xenial
 python:
-  - 3.5
   - 3.6
   - 3.7
 install:
   - pip install pip --upgrade
+  - pip install networkx==2.3
   - pip install -e git+https://github.com/XanaduAI/pennylane.git#egg=pennylane
   - pip install -r requirements.txt
   - pip install pytest pytest-cov wheel codecov --upgrade
diff --git a/doc/installing.rst b/doc/installing.rst
index e21795f..376db79 100644
--- a/doc/installing.rst
+++ b/doc/installing.rst
@@ -16,7 +16,7 @@ PennyLane-Cirq requires the following libraries be installed:
 as well as the following Python packages:
 
 * `PennyLane <http://pennylane.readthedocs.io/>`_ >=0.6
-* `Cirq <https://cirq.readthedocs.io/>`_ >= 0.5
+* `Cirq <https://cirq.readthedocs.io/>`_ >= 0.6
 
 
 If you currently do not have Python 3 installed, we recommend `Anaconda for Python 3 <https://www.anaconda.com/download/>`_, a distributed version of Python packaged for scientific computation.
diff --git a/pennylane_cirq/_version.py b/pennylane_cirq/_version.py
index c75878a..5016c07 100644
--- a/pennylane_cirq/_version.py
+++ b/pennylane_cirq/_version.py
@@ -16,4 +16,4 @@
    Version number (major.minor.patch[-label])
 """
 
-__version__ = "0.1.0"
+__version__ = "0.2.0-dev"
diff --git a/requirements.txt b/requirements.txt
index 0ff2477..ef9cc08 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,2 @@
 pennylane>=0.6
-cirq>=0.5
+cirq>=0.6
diff --git a/tests/test_apply.py b/tests/test_apply.py
index 903a195..9ef5d0b 100644
--- a/tests/test_apply.py
+++ b/tests/test_apply.py
@@ -228,7 +228,7 @@ def test_invalid_qubit_state_unitary(self, device):
         dev = device(2)
         state = np.array([[0, 123.432], [-0.432, 023.4]])
 
-        with pytest.raises(ValueError, match=r"Not a 2x2 unitary matrix"):
+        with pytest.raises(ValueError, match=r"Not a 2x2 .* unitary matrix"):
             with mimic_execution_for_apply(dev):
                 dev.apply("QubitUnitary", [0, 1], [state])
 
diff --git a/tests/test_cirq_device.py b/tests/test_cirq_device.py
index 4270bcb..8853893 100644
--- a/tests/test_cirq_device.py
+++ b/tests/test_cirq_device.py
@@ -415,7 +415,7 @@ def test_apply_two_wires(self, cirq_device_2_wires, gate, par, expected_cirq_gat
         assert len(ops) == len(expected_cirq_gates)
 
         for i in range(len(ops)):
-            assert ops[i]._gate == expected_cirq_gates[i]
+            assert ops[i].gate == expected_cirq_gates[i]
 
     
     # @pytest.mark.parametrize("operation,par,expected_cirq_gates", [