diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 52d2ba71..e8080a9f 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.14.2
+current_version = 0.14.5
 tag = True
 tag_name = {new_version}
 commit = True
diff --git a/.github/workflows/python-test.yml b/.github/workflows/python-test.yml
index 9d22fb30..64db07a4 100644
--- a/.github/workflows/python-test.yml
+++ b/.github/workflows/python-test.yml
@@ -23,10 +23,9 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        python -m pip install --upgrade pip
-        pip install -r requirements.txt
-        pip install -r requirements_dev.txt
-        pip install -e .
+        python -m pip install --upgrade pip setuptools
+        python -m pip install -r requirements_dev.txt
+        python -m pip install -e .[django,flask,requests]
     - name: Test
       run: python setup.py test
     - name: Upload coverage
diff --git a/openapi_core/__init__.py b/openapi_core/__init__.py
index 8d2eb35a..65f10c72 100644
--- a/openapi_core/__init__.py
+++ b/openapi_core/__init__.py
@@ -6,7 +6,7 @@
 
 __author__ = 'Artur Maciag'
 __email__ = 'maciag.artur@gmail.com'
-__version__ = '0.14.2'
+__version__ = '0.14.5'
 __url__ = 'https://github.com/p1c2u/openapi-core'
 __license__ = 'BSD 3-Clause License'
 
diff --git a/requirements.txt b/requirements.txt
index b2d723d3..09253b3c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 isodate==0.6.0
 dictpath==0.1.3
-openapi-spec-validator
-openapi-schema-validator
+openapi-spec-validator==0.3.3
+openapi-schema-validator==0.1.6
 six
 lazy-object-proxy
 attrs
diff --git a/requirements_2.7.txt b/requirements_2.7.txt
index f4eb34c3..b10069c5 100644
--- a/requirements_2.7.txt
+++ b/requirements_2.7.txt
@@ -1,6 +1,6 @@
 isodate==0.6.0
-openapi-spec-validator
-openapi-schema-validator
+openapi-spec-validator==0.3.3
+openapi-schema-validator==0.1.6
 six
 lazy-object-proxy
 backports.functools-lru-cache
diff --git a/requirements_dev.txt b/requirements_dev.txt
index e5d462ef..dfb7598a 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,7 +1,8 @@
 mock==2.0.0
 pytest==3.5.0
-pytest-flake8
+pytest-flake8==1.0.7
 pytest-cov==2.5.1
+flake8==3.9.2
 falcon==2.0.0; python_version<"3.0"
 falcon==3.0.0; python_version>="3.0"
 flask
diff --git a/setup.cfg b/setup.cfg
index 4936a19d..3b4a559b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -28,8 +28,8 @@ setup_requires =
 install_requires =
     isodate
     dictpath
-    openapi-spec-validator
-    openapi-schema-validator
+    openapi-spec-validator < 0.5.0
+    openapi-schema-validator < 0.3.0
     six
     lazy-object-proxy
     attrs
@@ -39,14 +39,19 @@ install_requires =
     backports.functools-lru-cache; python_version<"3.0"
     backports.functools-partialmethod; python_version<"3.0"
 tests_require =
-    mock; python_version<"3.0"
-    pytest
-    pytest-flake8
-    pytest-cov
+    mock == 2.0.0
+    pytest == 3.5.0
+    pytest-flake8 == 1.0.7
+    pytest-cov == 2.5.1
+    coverage == 5.5
+    djangorestframework == 3.9.4
+    flake8 == 3.9.2
     falcon
-    flask
+    falcon == 2.0.0; python_version<"3.0"
     responses
+    responses < 0.18.0; python_version<"3.0"
     webob
+    strict-rfc3339 == 0.7
 
 [options.packages.find]
 exclude =
@@ -54,9 +59,14 @@ exclude =
 
 [options.extras_require]
 django = 
-    django>=2.2; python_version>="3.0"
-flask = flask
-requests = requests
+    django < 2.0; python_version<"3.0"
+    django >= 2.2; python_version>="3.0"
+flask = 
+    flask
+    flask < 2.0.0; python_version<"3.0"
+requests = 
+    requests
+    requests < 2.28.0; python_version<"3.0"
 
 [tool:pytest]
 addopts = -sv --flake8 --junitxml reports/junit.xml --cov openapi_core --cov-report term-missing --cov-report xml:reports/coverage.xml
diff --git a/tests/integration/contrib/django/data/djangoproject/testapp/views.py b/tests/integration/contrib/django/data/djangoproject/testapp/views.py
index fa8448a6..fd6263ca 100644
--- a/tests/integration/contrib/django/data/djangoproject/testapp/views.py
+++ b/tests/integration/contrib/django/data/djangoproject/testapp/views.py
@@ -17,7 +17,7 @@ class TestView(APIView):
     def get(self, request, pk):
         with open(settings.OPENAPI_SPEC_PATH) as file:
             spec_yaml = file.read()
-        spec_dict = yaml.load(spec_yaml)
+        spec_dict = yaml.load(spec_yaml, yaml.FullLoader)
         spec = create_spec(spec_dict)
 
         openapi_request = DjangoOpenAPIRequest(request)

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