diff --git a/CHANGELOG.md b/CHANGELOG.md
index 16fad6f..5366106 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 Records breaking changes from major version bumps
 
+## 27.0.0
+
+Require the agreement details when creating a framework agreement
+
 ## 26.0.0
 
 Rename Supplier Evaluation methods to Lot Questions Response
diff --git a/dmapiclient/__init__.py b/dmapiclient/__init__.py
index 955e73f..1bf70d0 100644
--- a/dmapiclient/__init__.py
+++ b/dmapiclient/__init__.py
@@ -1,4 +1,4 @@
-__version__ = '26.7.0'
+__version__ = '27.0.0'
 
 from .errors import APIError, HTTPError, InvalidResponse  # noqa
 from .errors import REQUEST_ERROR_STATUS_CODE, REQUEST_ERROR_MESSAGE  # noqa
diff --git a/dmapiclient/data.py b/dmapiclient/data.py
index eb0a24c..f188ea4 100644
--- a/dmapiclient/data.py
+++ b/dmapiclient/data.py
@@ -1089,11 +1089,15 @@ def get_supplier_framework_agreement(self, framework_slug):
         return self._get(
             "/agreements/{}".format(framework_slug))
 
-    def create_framework_agreement(self, supplier_id, framework_slug, user=None):
+    def create_framework_agreement(self, supplier_id, framework_slug, signed_agreement_details, user=None):
         return self._post_with_updated_by(
             "/agreements",
             data={
-                "agreement": {"supplierId": supplier_id, "frameworkSlug": framework_slug},
+                "agreement": {
+                    "supplierId": supplier_id,
+                    "frameworkSlug": framework_slug,
+                    "signedAgreementDetails": signed_agreement_details
+                },
             },
             user=user
         )
diff --git a/tests/test_data_api_client.py b/tests/test_data_api_client.py
index 2e7cdec..b2eb233 100644
--- a/tests/test_data_api_client.py
+++ b/tests/test_data_api_client.py
@@ -2401,11 +2401,26 @@ def test_create_framework_agreement(self, data_client, rmock):
             json={"agreement": {'details': 'here'}},
             status_code=201)
 
-        result = data_client.create_framework_agreement(10, 'g-cloud-8', "user@example.com")
+        result = data_client.create_framework_agreement(
+            10,
+            'g-cloud-8',
+            {
+                "signerName": "Rex",
+                "signerRole": "Driver of the Aegis"
+            },
+            "user@example.com"
+        )
 
         assert result == {"agreement": {'details': 'here'}}
         assert rmock.last_request.json() == {
-            "agreement": {"supplierId": 10, "frameworkSlug": "g-cloud-8"},
+            "agreement": {
+                "supplierId": 10,
+                "frameworkSlug": "g-cloud-8",
+                "signedAgreementDetails": {
+                    "signerName": "Rex",
+                    "signerRole": "Driver of the Aegis"
+                }
+            },
             "updated_by": "user@example.com",
         }