diff --git a/.github/actions/install/action.yml b/.github/actions/install/action.yml
new file mode 100644
index 00000000..36326de8
--- /dev/null
+++ b/.github/actions/install/action.yml
@@ -0,0 +1,29 @@
+name: Install
+description: Install dependencies
+
+inputs:
+  python-version:
+    description: Python version for installing dependencies
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: Checkout the source code
+      uses: actions/checkout@v2
+
+    - name: Set the python version
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ inputs.python-version }}
+
+    - name: Set up pip package caching
+      uses: actions/cache@v2
+      with:
+        path: ~/.cache/pip
+        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+        restore-keys: ${{ runner.os }}-pip-
+
+    - name: Install dependencies
+      shell: bash
+      run: pip install -r requirements/ci.txt
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index c9d69041..61251419 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -2,7 +2,7 @@ name: Publish
 
 on:
   push:
-    tags: 
+    tags:
       - "*.*.*"
 
 jobs:
@@ -13,17 +13,21 @@ jobs:
       - name: Checkout the source code
         uses: actions/checkout@v2
 
-      - name: Set the python version
-        uses: actions/setup-python@v2
-        
         # This is the version of python used to package the code. The unit
-        # tests will have run against python 3.6, 3.7 etc ensuring 
+        # tests will have run against python 3.6, 3.7 etc ensuring
         # compatibility with those runtimes.
         # https://github.com/axnsan12/drf-yasg/pull/741#discussion_r713297594
+      - name: Set the python version
+        uses: actions/setup-python@v3
+        with:
+          python-version: 3.8
+
+      - name: Install dependencies
+        uses: ./.github/actions/install
         with:
           python-version: 3.8
 
-      - name: Install pip dependencies
+      - name: Install builders for publishing
         run: pip install -r requirements/publish.txt
 
       - name: Build the distributions
diff --git a/.github/workflows/review.yml b/.github/workflows/review.yml
index d03495c0..9f456e82 100644
--- a/.github/workflows/review.yml
+++ b/.github/workflows/review.yml
@@ -11,23 +11,27 @@ jobs:
         python: [3.6, 3.7, 3.8, 3.9]
 
     steps:
-      - name: Set up pip package caching
-        uses: actions/cache@v2
-        with:
-          path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
-          restore-keys: ${{ runner.os }}-pip-
-
       - name: Checkout the source code
         uses: actions/checkout@v2
 
       - name: Set the python version
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v3
+        with:
+          python-version: ${{ matrix.python }}
+
+      - name: Install dependencies
+        uses: ./.github/actions/install
         with:
           python-version: ${{ matrix.python }}
 
-      - name: Install pip dependencies
-        run: pip install -r requirements/ci.txt
+      - name: Run tests
+        env:
+          PYTHON_VERSION: ${{ matrix.python }}
+        run: tox -e $(tox -l | grep py${PYTHON_VERSION//.} | paste -sd "," -)
 
-      - name: Run unit tests
-        run: tox
+      - name: Check for incompatibilities with publishing to PyPi
+        if: ${{ matrix.python == 3.8 }}
+        run: |
+          pip install -r requirements/publish.txt
+          python setup.py sdist
+          twine check dist/*
diff --git a/README.rst b/README.rst
index 369d167c..acd4ff7f 100644
--- a/README.rst
+++ b/README.rst
@@ -360,26 +360,29 @@ provided out of the box - if you have ``djangorestframework-recursive`` installe
    :trim:
 
 drf-extra-fields
-===============================
-Integration with `drf-extra-fields <https://github.com/Hipo/drf-extra-fields>`_ has a problem with Base64 fields. The drf-yasg will generate Base64 file or image fields as Readonly and not required. Here is a workaround code for display the Base64 fields correctly.
+=================
+
+Integration with `drf-extra-fields <https://github.com/Hipo/drf-extra-fields>`_ has a problem with Base64 fields. 
+The drf-yasg will generate Base64 file or image fields as Readonly and not required. Here is a workaround code
+for display the Base64 fields correctly.
 
 .. code:: python
 
-class PDFBase64FileField(Base64FileField):
-    ALLOWED_TYPES = ['pdf']
-
-    class Meta:
-        swagger_schema_fields = {
-            'type': 'string',
-            'title': 'File Content',
-            'description': 'Content of the file base64 encoded',
-            'read_only': False  # <-- FIX
-        }
-
-    def get_file_extension(self, filename, decoded_file):
-        try:
-            PyPDF2.PdfFileReader(io.BytesIO(decoded_file))
-        except PyPDF2.utils.PdfReadError as e:
-            logger.warning(e)
-        else:
-            return 'pdf'
+  class PDFBase64FileField(Base64FileField):
+      ALLOWED_TYPES = ['pdf']
+  
+      class Meta:
+          swagger_schema_fields = {
+              'type': 'string',
+              'title': 'File Content',
+              'description': 'Content of the file base64 encoded',
+              'read_only': False  # <-- FIX
+          }
+  
+      def get_file_extension(self, filename, decoded_file):
+          try:
+              PyPDF2.PdfFileReader(io.BytesIO(decoded_file))
+          except PyPDF2.utils.PdfReadError as e:
+              logger.warning(e)
+          else:
+              return 'pdf'
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 8ccb0cee..c301ea3b 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -2,6 +2,14 @@
 Changelog
 #########
 
+**********
+**1.21.2**
+**********
+
+*Release date: Jul 17, 2022*
+
+**FIXED:** Fixed code block rst syntax in ``README.rst``
+
 **********
 **1.21.1**
 **********
diff --git a/requirements/publish.txt b/requirements/publish.txt
index 9f84aec3..ade35d85 100644
--- a/requirements/publish.txt
+++ b/requirements/publish.txt
@@ -1,2 +1,3 @@
 setuptools-scm==7.0.5
+twine==4.0.1
 wheel>=0.37.0