diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 8dcce72..f12f4e4 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -6,6 +6,7 @@ unreleased
 ==========
 * feat: Expiry field removed from version table and replaced with compliance number. Added additional content settings action to version table
 * fix: Changed model title to uppercase
+* fix: Compliance number should not be editable when version is not draft
 
 1.3.1 (2022-06-22)
 ==================
diff --git a/djangocms_content_expiry/admin.py b/djangocms_content_expiry/admin.py
index 94844bf..55370ef 100644
--- a/djangocms_content_expiry/admin.py
+++ b/djangocms_content_expiry/admin.py
@@ -10,7 +10,7 @@
 from django.utils.html import format_html_join
 from django.utils.translation import ugettext_lazy as _
 
-from djangocms_versioning.constants import PUBLISHED
+from djangocms_versioning.constants import DRAFT, PUBLISHED
 from djangocms_versioning.helpers import get_preview_url
 
 from .conf import DEFAULT_CONTENT_EXPIRY_EXPORT_DATE_FORMAT
@@ -284,6 +284,17 @@ def get_exported_queryset(self, request):
 
         return cl.get_queryset(request)
 
+    def get_readonly_fields(self, request, obj=None):
+        """
+        Compliance number should only be editable in draft versions
+        :param request: Request object
+        :param obj: Content expiry object
+        :return: Read-only form fields
+        """
+        if obj and obj.version.state != DRAFT:
+            return self.readonly_fields + ('compliance_number',)
+        return self.readonly_fields
+
 
 @admin.register(DefaultContentExpiryConfiguration)
 class DefaultContentExpiryConfigurationAdmin(admin.ModelAdmin):
diff --git a/tests/test_admin.py b/tests/test_admin.py
index 9ed10bd..4928ae2 100644
--- a/tests/test_admin.py
+++ b/tests/test_admin.py
@@ -11,7 +11,7 @@
 from cms.test_utils.testcases import CMSTestCase
 
 from bs4 import BeautifulSoup
-from djangocms_versioning.constants import DRAFT, PUBLISHED
+from djangocms_versioning.constants import ARCHIVED, DRAFT, PUBLISHED, UNPUBLISHED
 
 from djangocms_content_expiry.admin import ContentExpiryAdmin
 from djangocms_content_expiry.conf import DEFAULT_CONTENT_EXPIRY_EXPORT_DATE_FORMAT
@@ -103,6 +103,80 @@ def test_change_form_title(self):
         self.assertEqual(response.status_code, 200)
         self.assertEqual(response.context_data['title'], 'Additional Content Settings')
 
+    def test_change_form_compliance_number_field_is_editable_when_draft_version(self):
+        """
+        Compliance number field should be an input field and editable when version is draft
+        """
+        content_expiry = PollContentExpiryFactory(version__state=DRAFT)
+
+        endpoint = self.get_admin_url(ContentExpiry, "change", content_expiry.pk)
+        draft_expected_content = f'<input type="text" name="compliance_number" ' \
+                                 f'value="{content_expiry.compliance_number}" ' \
+                                 f'class="vTextField" maxlength="15" id="id_compliance_number">'
+
+        with self.login_user_context(self.get_superuser()):
+            response = self.client.get(endpoint)
+
+        self.assertEqual(response.status_code, 200)
+
+        decoded_response = response.content.decode("utf-8")
+
+        self.assertIn(draft_expected_content, decoded_response)
+
+    def test_change_form_compliance_number_field_is_not_editable_in_published_version(self):
+        """
+        Compliance number field should not be editable when version is published
+        """
+        content_expiry = PollContentExpiryFactory(version__state=PUBLISHED)
+
+        endpoint = self.get_admin_url(ContentExpiry, "change", content_expiry.pk)
+        published_expected_response = f'<div class="readonly">{content_expiry.compliance_number}</div>'
+
+        with self.login_user_context(self.get_superuser()):
+            response = self.client.get(endpoint)
+
+        self.assertEqual(response.status_code, 200)
+
+        decoded_response = response.content.decode("utf-8")
+
+        self.assertIn(published_expected_response, decoded_response)
+
+    def test_change_form_compliance_number_field_is_not_editable_in_archived_version(self):
+        """
+        Compliance number field should not be editable when version is archived
+        """
+        content_expiry = PollContentExpiryFactory(version__state=ARCHIVED)
+
+        endpoint = self.get_admin_url(ContentExpiry, "change", content_expiry.pk)
+        archived_expected_response = f'<div class="readonly">{content_expiry.compliance_number}</div>'
+
+        with self.login_user_context(self.get_superuser()):
+            response = self.client.get(endpoint)
+
+        self.assertEqual(response.status_code, 200)
+
+        decoded_response = response.content.decode("utf-8")
+
+        self.assertIn(archived_expected_response, decoded_response)
+
+    def test_change_form_compliance_number_field_is_not_editable_in_unpublished_version(self):
+        """
+        Compliance number field should not be editable when version is unpublished
+        """
+        content_expiry = PollContentExpiryFactory(version__state=UNPUBLISHED)
+
+        endpoint = self.get_admin_url(ContentExpiry, "change", content_expiry.pk)
+        unpublished_expected_response = f'<div class="readonly">{content_expiry.compliance_number}</div>'
+
+        with self.login_user_context(self.get_superuser()):
+            response = self.client.get(endpoint)
+
+        self.assertEqual(response.status_code, 200)
+
+        decoded_response = response.content.decode("utf-8")
+
+        self.assertIn(unpublished_expected_response, decoded_response)
+
 
 class ContentExpiryChangelistTestCase(CMSTestCase):
     def setUp(self):